Full opinion text
LYNCH, Chief Judge. This case involves legal challenges to recent federal management actions taken in New England’s sensitive Multispecies Groundfish Fishery. We reject the many challenges and affirm entry of summary judgment for the federal defendants. Under the Magnuson-Stevens Fishery Conservation and Management Act, 16 U.S.C. §§ 1801-1884, the New England Fishery Management Council (“N.E. Council”) regulates fishery resources within the federal waters off New England’s coast. It does so primarily through Fishery Management Plans (“FMPs”), which it reevaluates biennially in light of the latest scientific information and congressionally imposed mandates and deadlines to prevent overfishing. Those mandates and deadlines were recently altered by the Magnuson-Stevens Fishery Conservation and Management Reauthorization Act of 2006, Pub. L. No. 109-479, 120 Stat. 3575 (2007), which introduced a suite of stringent protections for depleted fisheries. This litigation centers on the N.E. Council’s adjustments to the FMP governing the Northeast Multispecies Groundfish Fishery (“Fishery”). The N.E. Council was required by law to implement changes to the Fishery’s 2004 FMP by the 2010 fishing year, taking into account both the Reauthorization Act’s new protections and the results of a study conducted in 2008 on the health of the Fishery’s stocks of fish. The study results showed that the situation was worse than previously believed. A number of groundfish stocks were overfished and subject to overfishing; only two stocks had improved since the 2004 FMP’s implementation. This trend has continued to the present. The N.E. Council adopted a new proposed groundfish FMP, Amendment 16, after 3 years’ work, which included several publications in the Federal Register, eight public hearings, and receipt of numerous comments. The federal environmental impact statement prepared for Amendment 16 acknowledged the severe economic hardships facing New England’s fishing communities. On January 21, 2010, Amendment 16 was upheld on administrative review by the National Marine Fisheries Service (“NMFS”) of the National Oceanic and Atmospheric Administration (“NOAA”) within the U.S. Department of Commerce. The NMFS promulgated Amendment 16 through three related sets of regulations that, inter alia, altered and expanded the Fishery’s preexisting “sector allocation program” and established new restrictions on fishing activities to end and prevent overfishing. These regulations took effect on May 1, 2010. Plaintiffs then filed suit in federal court alleging that Amendment 16 conflicts with the Reauthorization Act’s provisions governing “limited access privilege programs,” 16 U.S.C. § 1853a, with the ten “national standards” applicable to all FMPs, id. § 1851(a)(l)-(10), and with the requirements of the National Environmental Policy Act, 42 U.S.C. § 4321 et seq. They unsuccessfully sought to enjoin implementation of Amendment 16. The district court granted summary judgment for defendants as to all claims. City of New Bedford v. Locke, No. 10-10789-RWZ, 2011 WL 2636863 (D.Mass. June 30, 2011). We affirm. I. Amendment 16 arose within the complicated statutory and regulatory system governing New England’s federal fisheries. A. Statutory Background: The Magnuson-Stevens Act and the National Environmental Policy Act More than thirty years ago, in response to growing concerns about the nation’s depleted fisheries, Congress adopted the Magnuson-Stevens Fishery Conservation and Management Act (“MSA”), 16 U.S.C. §§ 1801-1884, “to conserve and manage the fishery resources found of the coasts off the United States,” id. § 1801(b)(1). Under the MSA, the federal government exercises “exclusive fishery management authority” over waters that are 3 to 200 nautical miles off the United States shoreline. Id., § 1811(a); Little Bay Lobster Co. v. Evans, 352 F.3d 462, 464 (1st Cir.2003). Management of territorial divisions within these waters is entrusted to eight Regional Fishery Management Councils, which are composed of state and federal fishery officials and. other private individuals appointed by the Secretary of Commerce. 16 U.S.C. § 1852(a)-(b). Councils regulate fishing activities through FMPs and amendments thereto, id. § 1852(h)(1), which they submit to the NMFS for review, id. § 1853(c). After ensuring that a proposed FMP is consistent with the MSA, its ten national standards, and any other applicable laws, id. § 1854(a)(1)(A), and after a statutorily designated period of public comment, id. § 1854(a)(1)(B), the NMFS executes a finalized FMP through regulations, id. § 1854(b), as it did for Amendment 16. The National Environmental Policy Act (“NEPA”), in turn, requires federal agencies to include an environmental impact statement (“EIS”) for any action that “significantly affect[s] the quality of the human environment,” 42 U.S.C. § 4332(2)(C), including FMPs, see Campanale & Sons, Inc. v. Evans, 311 F.3d 109, 113 (1st Cir.2002). An EIS must provide a “full and fair discussion of significant environmental impacts [of the intended action]” and “inform decisionmakers and the public of the reasonable alternatives which would avoid or minimize adverse impacts or enhance the quality of the human environment.” 40 C.F.R. § 1502.1. B. Regulatory History: The Northeast Multispecies Groundfish Fishery The Fishery is composed of thirteen bottom-dwelling fish species, inhabiting waters from Maine to the mid-Atlantic, which are divided for management purposes into twenty individual “stocks.” Since the MSA’s inception, the Fishery has faced persistent problems with overfishing and depletion of stocks. In response, the N.E. Council has over the years adopted an assortment of regulatory strategies, with varying degrees of success. See, e.g., Associated Fisheries of Me., Inc. v. Daley, 127 F.3d 104, 107 (1st Cir.1997). In 1985, the N.E. Council developed the Northeast Multispecies Fishery Management Plan, the Fishery’s first permanent FMP, which took effect in 1986. 51 Fed. Reg. 29,642-02 (Aug. 20, 1986); see also Conservation Law Found. of New Eng., Inc. v. Franklin, 989 F.2d 54, 58 (1st Cir.1993). The 1986 FMP established restrictions on gear and fish sizes and provided for periodic area closures. 51 Fed. Reg. at 29,647-53. Later amendments augmented these restrictions, but they proved collectively ineffective in reducing overfishing. See Associated Fisheries, 127 F.3d at 107; Conservation Law Found., 989 F.2d at 58. By the mid-1990s, the Fishery’s annual landings and biomass had reached historic lows, AR 019875, 019879, and significant revisions to the Fishery’s management system became necessary. 1. Amendment 5 (1991): A Revised Permitting Scheme and the Days-at-Sea Effort-Reduction Program In 1994, the NMFS approved Amendment 5 (“A5”), 59 Fed. Reg. 9872 (Mar. 1, 1994), the first in a series of amendments to the 1986 FMP that substantially altered the Fishery’s management strategy. A5 introduced two measures of present significance: a new approach to permits and a Days-at-Sea management program. First, the Council sought to reduce total fishing activity by restricting the availability of permits, and A5 “substantially change[d] the fishing vessel permit application process.” Id., at 9874. Vessel owners now applied for a permit in one of three permit classes. See id. at 9886. Each permit class was subject to eligibility-criteria based largely on the fishing gear and capacity of the underlying vessel. See id. at 9886-89. Second, A5 established the Days-at-Sea (“DAS”) effort-reduction program. Id., at 9873. This program attempted to curb overfishing through a series of “input” controls, or restrictions on the effort fishermen could “input” into catching fish, rather than through an alternate model of “output” controls, or restrictions on the number of fish coming out of a fishery. See Medeiros v. Vincent, 431 F.3d 25, 30-31 (1st Cir.2005) (describing “input” and “output” controls). The DAS input control program was oft-amended and yielded mixed results as to prevention of overfishing. Associated Fisheries of Me., Inc. v. Evans, 350 F.Supp.2d 247, 249 (D.Me. 2004). While the overall biomass of the Fishery improved, certain pivotal stocks, including cod and flounder, remained acutely diminished. AR 019875, 031537. 2. Amendment 13 (200k): The First and Limited Sector Allocation Program In March 2004, the NMFS partially approved Amendment 13 (“A13”), designed “to end overfishing and rebuild NE multispecies (groundfish) stocks,” 69 Fed. Reg. 22,906, 22,906 (Apr. 27, 2004), in part building upon the DAS input control measures. A13 reduced some DAS allocations, eliminated certain exemptions, increased vessel monitoring, and announced a rebuilding strategy for the Fishery. Id.; see also Associated Fisheries, 350 F.Supp.2d at 250. Significantly, A13 also introduced a new management system, the “sector allocation program,” 69 Fed. Reg. at 22,914-15, as a partial alternative method of management. A13’s sector allocation program allowed fishermen to choose, in lieu of fishing under the revised DAS program, to band together into voluntary, self-selecting groups or “sectors.” Id., at 22,914. Each sector would receive its own allocation of either DAS or Total Allowable Catch (“TAC”). Id., Unlike a DAS allocation, a TAC allocation is an “output” control that caps the total amount of fish that may be caught in a given fishing year. See Oceana, Inc. v. Locke, 831 F.Supp.2d 95, 102-03 (D.D.C.2011). Under A13, both TAC and DAS allocations were held by sectors for the exclusive use of their members. See 69 Fed. Reg. at 22,945 (defining a sector as “a group of vessels that have voluntarily signed a contract and agree to certain fishing restrictions, and that have been allocated a portion of the TAC of a species, or an allocation of DAS”). The making of allocations to A13 sectors followed a formal procedure. Id, at 22,-981-83. At least one year prior to the date on which it intended to begin operations, a would-be sector (or any person participating in one) had to submit a TAC or DAS allocation proposal to the Council on behalf of a group of limited access NE multispecies vessels. Id, at 22,981. If approved, the Council would then initiate a framework adjustment to authorize a TAC or DAS allocation to a sector based on the fishing history of its members. Id, Finally, after approval and allocation, a sector would submit its own binding management plan, detailing how its members would each fish the sector’s allocation. Id, at 22,982. These plans were subject to “solicitation of public comment and consultation with the Council,” id at 22,929 (response to comment 64), and sector participants were required to possess a Letter of Authorization, issued by the NMFS, evidencing their sector affiliation, id at 22,982-83. Amendment 16, as described below, modified the timing of some steps in this process. The impact of A13’s adoption of sector management was at least twofold. First, sectors offered fishermen a degree of flexibility in adjusting to “increasing restrictions imposed to rebuild groundfish stocks.” Id, at 22,944. Because sectors fished their allocations to their liking, sector participants could remain economically viable by “pool[ing] harvesting resources and consolidat[ing] operations in fewer vessels if they desire[d].” Id, at 22,943. Second, sectors allowed participating fishermen to protect themselves from reductions in annual allocations. While sector members were jointly and severally liable for their own overfishing, id at 22,-982, they were immune from “reductions of catch or effort as a result of the actions of vessels outside [their] sector,” id at 22,943. This encouraged stewardship and self-policing among sector members and reduced the need for intervention by the Council and NMFS. Id, at 22,914. A13 approved one sector, the Georges Bank Cod Hook Gear Sector, id at 22,914-15, and a second, the Georges Bank Cod Fixed Gear Sector, was approved in 2006, see 71 Fed. Reg. 62,156, 62,165 (Oct. 23, 2006). Both opted for a TAC allocation. In 2009, these sectors represented approximately 50 of the Fishery’s 700 active fishing vessels. AR 052784. The remainder of the Fishery’s vessels chose to continue fishing under a more restrictive version of the DAS input control program and were subject to the restrictions attached to their permit class. AR 047761, 052784. 3. Amendment 16 (2006 — Present): A Shift Away from Iwput-Based Management On November 6, 2006, the N.E. Council published a notice of intent to begin preparing Amendment 16 (“A16”), 71 Fed. Reg. 64,941, the subject of this litigation. The notice stated that, “[i]n addition to considering adjustments to the current effort control management system,” A16 might introduce “other management systems” to “replace or supplement” the existing scheme. Id., at 64,942. Measures under consideration included expansion of the sector program as well as an “individual quota system[ ].” Id., The notice proposed an implementation date for A16 of May 1, 2009, or the start of the 2009 fishing year. Id., at 64,943. Two months later, however, Congress passed the Reauthorization Act, and the Council delayed its preparations so that A16 could meet the newly imposed congressional requirements. C. The Magnuson-Stevens Reauthorization Act On January 12, 2007, the Reauthorization Act took effect. See 2007 U.S.C.C.A.N. S83 (Jan. 12, 2007). The Reauthorization Act established new conservation mandates for all FMPs. FMPs were now required to include “annual catch limits” (“ACLs”) that were set at a level “such that overfishing does not occur in the fishery,” as well as “measures to ensure accountability” (“AMs”) to these limits. 16 U.S.C. § 1853(a)(15). Reflecting Congress’s intent to increase the role of science in fishery management, proposed ACLs could “not exceed the fishing level recommendations of [a council’s] scientific and statistical committee or the peer review process.” Id., § 1852(h)(6). Congress also added a section to the MSA governing the implementation of new “limited access privilege programs,” or LAPPs. 16 U.S.C. § 1853a. Unlike with the Reauthorization Act’s mandatory ACLs and AMs, councils were not required to adopt LAPPs in managing fisheries within their jurisdiction. Id., § 1853a(a). However, councils that chose to develop a LAPP through an FMP had to incorporate certain protections elaborated in section 1853a. Most of section 1853a’s requirements applied to all councils, e.g., id. § 1853a(b)(l), (5), but Congress both imposed a unique requirement on the N.E. Council and created a unique exception to that requirement. The N.E. Council could not adopt an “individual fishing quota” (“IFQ”), a type of LAPP, unless such a measure was first approved in a referendum by more than two-thirds of the Fishery’s “eligible permit holders” and other “fishery participants,” as determined by the Secretary. Id., § 1853a (c)(6)(D)®. But Congress also exempted “sector allocation^]” from the referendum requirement. Id., § 1853a (c)(6)(D)(vi). Councils and the NMFS were required to implement new FMPs by the 2010 fishing year for all fisheries subject to overfishing, and by the 2011 fishing year for all others. See Pub. L. No. 109-479, Tit. I, § 104(b), 120 Stat. at 3584 (providing effective dates for 16 U.S.C. § 1853(a)(15)). 1. Al6’s Development After the Reauthorization Act In light of the Reauthorization Act’s new requirements, the N.E. Council postponed its proposed implementation date for A16 from the start of the 2009 fishing year to the start of the 2010 fishing year (May 1, 2010). In the interim, in September of 2008, the Council received the results of the third Groundfish Assessment Review Meeting (“GARM III”), a scientific evaluation of the Fishery’s health. GARM III concluded that eleven of the Fishery’s stocks were overfished and subject to overfishing. By comparison, GARM II, conducted in 2004, identified seven such stocks. AR 018986-87, 022347. The scientific results of GARM III had to be given weight in the development of A16. On April 24, 2009, after eight hearings at which public comments were received, and over forty additional meetings, the N.E. Council published a draft EIS analyzing measures under consideration for A16, 74 Fed. Reg. 18,705 (Apr. 24, 2009), with comments due by June 8, 2009. In June 2009, the Council adopted its final measures for A16 and submitted the plan to the NMFS for review and approval. The NMFS published a notice of availability for that version of A16, along with its final EIS, on October 23, 2009, 74 Fed. Reg. 54,773 (Oct. 23, 2009), with comments due by December 22, 2009. On December 31, 2009, the NMFS published a proposed rule which would implement the FMP recommended in A16, 74 Fed. Reg. 69,382 (Dec. 31, 2009), with comments due by January 20, 2010. After considering all comments, the NMFS largely approved A16 and issued three related sets of regulations: (1) Amendment 16, which details A16’s rebuilding program and revises existing management strategies, 75 Fed. Reg. 18,-262 (Apr. 9, 2010); (2) the Sector Operations Rule, which approves seventeen additional sectors under the revised sector allocation program, 75 Fed. Reg. 18,113 (Apr. 9, 2010); and (3) Framework Adjustment 44, which establishes catch limits for each stock within the Fishery, 75 Fed. Reg. 18,356 (Apr. 9, 2010). These regulations took effect on May 1, 2010, and it is these regulations which are challenged. We group together all three under the generic term A16. 2. Changes Resulting from Al 6 Extensive revisions to the Fishery’s management system were necessary to meet the Reauthorization Act’s mandates to end overfishing and rebuild affected stocks. See 16 U.S.C. § 1854(e)(3). Two decades of almost exclusive input-based management had left the Fishery’s stocks on the brink of collapse. The necessary scope of these revisions made some economic hardship inevitable. Recognizing this fact, the N.E. Council introduced measures to mitigate such harm to the extent they deemed practicable. Two of A16’s management measures are central to this appeal. First, consistent with the mandate of 16 U.S.C. § 1853(a)(15), A16 established new “ACLs for all stocks covered by the NE Multispecies FMP,” 75 Fed. Reg. at 18, 357, and AMs to ensure compliance with these limits, id. at 18,360. ACLs were set below the acceptable biological catch levels recommended by the Council’s Science and Statistical Committee, and were subject to biennial adjustment based on the best available data. For certain stocks, A16’s ACLs represented significant reductions from previous fishing levels. Plaintiffs do not challenge these reductions per se, but do attack defendants’ decision to develop ACLs on a stock-by-stock basis. Second, A16 altered and expanded the sector allocation program introduced by A13. To streamline the sector allocation procedure, A16 assigned every limited access permit holder a “potential sector contribution” (“PSC”), which represented a share of the new ACLs for each of the Fishery’s stocks. 75 Fed. Reg. at 18,276. PSCs were assigned for each stock based on a permit holder’s historic landings from 1996 to 2006, id; this was a departure from the five-year time frame used under A13, 69 Fed. Reg. at 22,981. Upon a permit-holder joining a sector, his or her PSC would be combined with the PSCs of other members to determine that sector’s “annual catch .entitlement” (“ACE”), or the maximum amount of each fish stock that a sector’s members could collectively catch. 75 Fed. Reg. at 18,276. In contrast to A13, there was no DAS alternative to ACE allocations; that choice was “[consistent with the Council’s intent to transition from input controls to output controls.” Id., Once a sector reached its ACE, it had to cease fishing activity in that stock, id at 18,277 with one caveat: A16 sectors could lease ACE from other sectors, subject to certain requirements, and so add to their own catch for a particular stock. Id Participation by permit holders in sectors remained voluntary, and permit holders who chose not to participate had an alternative: they would fish in the “common pool.” Id., at 18,267, 18,275. Within the common pool, all fishing activities were governed by an amended DAS input control system. Id., at 18,268. As a result, for those who chose not to join a sector but to fish in the common pool, the PSCs assigned to those permit holders became irrelevant and played no role in regulating fishing activity. AR 047767 (“This action essentially results in the commercial groundfish fishery being managed under two different regimes: sectors and effort [input] controls.”). At the time A16 was promulgated, it was unknown who among the Fishery’s permit holders would pick which option. When the sector rosters were finalized, some 812 of the Fishery’s 1477 eligible permit holders had chosen to join a sector. Although this sector choice represented only 55% of the Fishery’s individual permits, these vessels were responsible for 98% of the previous decade’s catch. 75 Fed. Reg. at 18,-114, 18,115 tbl. 1. This was a significant change from the number of permits and catch percentage represented by sectors under A13. II. There are several cases brought by different plaintiffs which were consolidated before this court on appeal. We briefly address the district court proceedings, the parties’ arguments on appeal, and the governing standards of review. A. District Court Proceedings On August 3, 2010, two actions challenging aspects of A16 were consolidated in the District of Massachusetts. The first, filed by the cities of New Bedford and Gloucester (each major fishing ports) and others (collectively, “New Bedford”), alleged that A16 violated the MSA’s ten national standards and the NEPA. New Bedford sought an order enjoining enforcement of A16 and requiring defendants to take certain actions. The second, filed by fisherman James Lovgren, on behalf of himself and similarly situated fishermen (collectively, “Lovgren”), advanced similar claims, but also alleged that A16 was an IFQ and that defendants had failed to conduct a referendum as required by the Reauthorization Act, see 16 U.S.C. § 1853a(c)(6)(D)(i). Lovgren sought a declaratory judgment that defendants violated the MSA and other relief. Defendants in both actions were the federal agencies and officials responsible for implementing and enforcing A16, including the NMFS, the NOAA, former Secretary of Commerce Gary Locke, and NOAA Administrator Jane Lubchenco. Conservation Law Foundation (“CLF”) intervened in defense of A16. On June 30, 2011, the district court issued an order resolving cross-motions for summary judgment in favor of defendants. City of New Bedford, 2011 WL 2636863. Several plaintiffs moved for reconsideration, which was denied on August 17, 2011. Four timely appeals ensued. B. Parties and Arguments on Appeal Plaintiffs-appellants are New Bedford (No. 11-1952), Lovgren (No. 11-1964), American Alliance of Fishermen (“American Alliance”) (No. 11-1987), and others. Two Congressmen who represented New Bedford and Gloucester at the time of A16’s enactment, and Food & Water Watch, Inc. (“FWW”), filed briefs amicus curiae in support of certain arguments by plaintiffs. Defendants and intervenor CLF remain as appellees. Amicus Georges Bank Cod Fixed Gear Sector, a sector established under A13, supports A16. Plaintiffs challenge A16 on a multitude of grounds. Taken together, the challenges fall into three broad categories: (1) that A16’s sector program is a LAPP, an IFQ, or both under the MSA, contrary to defendants’ determination, and as a result, A16 was implemented without certain protections required by the Reauthorization Act’s LAPP provisions, found in 16 U.S.C. § 1853a; (2) that certain features of A16 contravene several of the MSA’s ten national standards; and (3) that A16 was implemented without proper consideration of reasonable alternatives and the best available information, in violation of the NEPA. Within these categories, each plaintiff asserts its own arguments, which are at times in tension with those advanced by other plaintiffs or amici. We refer to these individual arguments where such reference is helpful. Federal defendants and CLF defend A16 against legal attack on the following bases: (1) A16 is a proper exercise of the NMFS’s delegated power under the MSA because (a) no element in A16’s sector program meets the elements of the statutory definition of a LAPP or an IFQ, and (b) the NMFS’s interpretation of the Reauthorization Act is entitled to deference; (2) A16 is consistent with the ten national standards, and the Reauthorization Act’s mandatory conservation requirements explain many of the choices said to violate those standards; and (3) the N.E. Council and the NMFS met their respective obligations under the NEPA. C. Standard of Review We review the district court’s grant of summary judgment de novo. Little Bay Lobster Co., 352 F.3d at 466. Judicial review of regulations challenged under the MSA and the NEPA is governed by the Administrative Procedure Act (“APA”), 5 U.S.C. §§ 701-706. See 16 U.S.C. § 1855(f); see also Associated Fisheries, 127 F.3d at 109 (MSA); Airport Impact Relief, Inc. v. Wykle, 192 F.3d 197, 202 (1st Cir.1999) (NEPA). Our review is limited to the administrative record, Massachusetts ex rel. Div. of Marine Fisheries v. Daley, 170 F.3d 23, 28 n. 4 (1st Cir.1999), on the basis of which we may set aside an agency action only if it is “arbitrary, capricious, an abuse of discretion, or otherwise not in accordance with law.” 5 U.S.C. § 706(2)(A). “Because the APA standard affords great deference to agency decision-making and because the Secretary’s action is presumed valid, judicial review, even at the summary judgment stage, is narrow.” Associated Fisheries, 127 F.3d at 109. We address separately each of plaintiffs’ challenges. III. The first set of issues on appeal concerns whether the implementation of A16 is contrary to law because its sector program: (1) is a LAPP or an IFQ and does not contain the mandatory protections announced in 16 U.S.C. § 1853a; (2) is an IFQ and was not subject to approval through a referendum, id. § 1853a(c)(6)(D); or (3) is an otherwise arbitrary or capricious exercise of the NMFS’s delegated authority. Section 1853a provides that “[ajfter January 12, 2007, a Council may submit, and the Secretary may approve, for a fishery that is managed under a limited access system, a limited access privilege program to harvest fish if the program meets the requirements of this section.” Id., § 1853a(a). Defendants concede that A16 does not contain the protections set out in the remainder of section 1853a, and the parties agree that the Fishery is managed under a “limited access system.” Their disagreement centers on whether the NMFS illegally concluded that the features of A16’s sector program did not qualify as a LAPP, a conclusion that rendered section 1853a inapplicable. Our analysis of an agency’s interpretation of a statute proceeds in three stages. First, we assess the statutory text to determine “whether Congress has directly spoken to the precise question at issue. If so, courts, as well as the agency, must give effect to the unambiguously expressed intent of Congress.” Saysana v. Gillen, 590 F.3d 7, 12 (1st Cir.2009) (citations omitted) (quoting Succar v. Ashcroft, 394 F.3d 8, 22 (1st Cir.2005)) (internal quotation marks omitted). Second, if Congress’s intent is uncertain, we decide whether and to what extent the agency’s interpretation is entitled to deference. See Mayo Found. for Med. Educ. & Research v. United States, — U.S. —, 131 S.Ct. 704, 712, 178 L.Ed.2d 588 (2011) (resolving the parties’ competing arguments on “the proper framework for evaluating [the agency’s construction of] an ambiguous provision”); United States v. Mead Corp., 533 U.S. 218, 227-31, 121 S.Ct. 2164, 150 L.Ed.2d 292 (2001). Finally, we evaluate the agency’s interpretation under the governing standard to determine whether it “exceeds the bounds of the permissible.” Barnhart v. Walton, 535 U.S. 212, 218, 122 S.Ct. 1265, 152 L.Ed.2d 330 (2002). Plaintiffs argue, for different reasons, that the analysis should end at stage one. New Bedford and American Alliance make two arguments: first, that A16’s sector program meets the statutory definition of a LAPP; and second, that even if there is some technical reading on which it does not, A16’s sector program should be treated as a LAPP nonetheless. This is so because, considered in its totality, the sector program is functionally, if not formally, equivalent to a LAPP. Plaintiffs assert that section 1853a’s protections are important because they were designed to ameliorate the “well-known adverse effects of quota based programs.” These protections, missing from A16, include: (1) restrictions on foreign participation in a LAPP, 16 U.S.C. § 1853a(c)(l)(D)-(E); (2) procedures to ensure equitable allocations of fishing privileges, id. § 1853a(c)(l)(I), (c)(5)(A); (3) limitations on excess consolidation, id. § 1853a(c)(5)(D); and (4) measures to recover and minimize costs associated with LAPP formation, id. § 1853a(e). New Bedford and American Alliance submit that A16’s sector program has these problematic features against which the § 1853a protections were designed and that should trigger section 1853a’s corresponding protections. Lovgren, supported by New Bedford, makes a somewhat different argument that A16 is not only a LAPP but also an IFQ, for which approval through a referendum is required. The referendum requirement is found at 16 U.S.C. § 1853a(c)(6)(D)(i) and provides that: [T]he New England [Council] ... may not submit, and the Secretary may not approve or implement, a fishery management plan or amendment that creates an individual fishing quota program, including a Secretarial plan, unless such a system, as ultimately developed, has been approved by more than 2/3 of those voting in a referendum among eligible permit holders, or other persons [deemed eligible to vote by the Secretary]. Importantly, there is an exemption from the referendum requirement concerning sectors, which both parties emphasize. Congress expressly stated that “[i]n this subparagraph, the term ‘individual fishing quota’ does not include a sector allocation.” Id., § 1853a(c)(6)(D)(vi) (emphasis added). Federal defendants offer separate responses to these arguments. As to New Bedford and American Alliance’s argument, federal defendants do not argue that the statute compels the result that Alb’s sector program is not a LAPP or an IFQ, but rather that their result is the most reasonable interpretation of congressional intent and that Congress entrusted to them and their considerable expertise this area of fisheries management. However, with respect to Lovgren’s argument, federal defendants do argue that the text Congress enacted plainly decided that A16’s sectors are not IFQs for purposes of the referendum requirement. At the first stage of analysis, for the reasons which follow, we agree with defendants that the statutory text does not compel the conclusion that A16’s sector program meets the statutory definition of a LAPP or an IFQ. Rather, the text of the Reauthorization Act not only permits the NMFS’s interpretation, but lends support to its reasonableness at the third stage of our analysis. Moreover, federal defendants’ argument that the text does not permit the conclusion that A16’s sector program is subject to the referendum requirement is correct. We reject Lovgren’s argument to the contrary. We next conclude that, at a minimum, Chevron deference is called for, Chevron, U.S.A., Inc. v. Natural Res. Def. Council, Inc., 467 U.S. 837, 104 S.Ct. 2778, 81 L.Ed.2d 694 (1984), and that we must defer to the agency’s reasoned decision that A16’s sector program is not a LAPP and is not an IFQ, Mead, 533 U.S. at 229, 121 S.Ct. 2164. A. Clarity of the Statute We first ask whether Congress has expressed a clear intent that the features of A16’s sector program bring it within the statutory definition of a LAPP or an IFQ. See Succar, 394 F.3d at 22. “If Congress’s intent is clear, that intent governs — both the court and the agency must give it full effect.” Dominion Energy Brayton Point, LLC v. Johnson, 443 F.3d 12, 15 (1st Cir.2006). The Reauthorization Act did not define the term “limited access privilege program,” but it did define a . “limited access privilege.” The parties refer to both as LAPPs, and so will we. The term “limited access privilege”— (A) means a Federal permit, issued as part of a limited access system under section 1853a of this title to harvest a quantity of fish expressed by a unit or units representing a portion of the total allowable catch of the fishery that may be received or held for exclusive use by a person; and (B) includes an individual fishing quota; but (C) does not include community development quotas as described in section 1855® of this title. 16 U.S.C. § 1802(26) (emphasis added). The definition of an “individual fishing quota,” which was added to the MSA by the Sustainable Fisheries Act, Pub. L. No. 104-297, Tit. I, § 102, 110 Stat. 3562, 3562 (1996), differs slightly, as emphasized below: The term “individual fishing quota” means a Federal permit under a limited access system to harvest a quantity of fish, expressed by a unit or units representing a percentage of the total allowable catch of a fishery that may be received or held for exclusive use by a person. Such term does not include community development quotas as described in section 1855® of this title. 16 U.S.C. § 1802(23) (emphasis added). The parties agree that the distinction between “limited access privileges” and “individual fishing quotas,” both individually and as management programs, is largely irrelevant here. With the notable exception of the referendum requirement, which applies only to IFQs, section 1853a’s protections apply equally to both LAPPs and IFQs. In developing A16, the N.E. Council was cognizant of the Reauthorization Act’s LAPP provisions. During the scoping process, the Council declined to pursue certain proposals which might raise questions about the applicability of section 1853a’s protections. Additionally, before settling on specific revisions to A13’s sector allocation program, the Council obtained advice from the NMFS to ensure that the measures under review did not violate the terms of section 1853a, AR 051697-99, and considered public comments on the issue as well, AR 050496. Through these deliberations, the N.E. Council and NMFS concluded that A16’s sector program was not a LAPP and that section 1853a’s provisions did not apply. In A16’s final rule, the NMFS offered the following explanation: Based upon the comments received on the proposed rule for this action, there remains some confusion as to whether a sector is a limited access privilege program (LAPP), as defined in the Magnuson-Stevens Act. NMFS would like to clarify that NMFS does not consider sectors to be LAPPs, and they are not subject to the referendum or cost-recovery requirements of the Magnuson-Stevens Act. There is no permit issued to a sector, and no permanent or long-term allocation of fish is made to any sector. Unlike individual fishing quotas (IFQs), sectors are temporary, voluntary, fluid associations of vessels that can join together to take advantage of flexibilities and efficiencies that sectors are afforded. Vessel owners may choose to join a sector or not, and can change their decisions from one year to the next, based on what they believe are the best opportunities for them at that point in time. 75 Fed. Reg. at 18,275. A second discussion, appearing in the comments portion of A16’s final rule, added to this reasoning that its sectors were not LAPPs because “[i]ndividual sectors are not issued a permit, they are not allocated a portion of the TAC, and they are not clearly ‘persons’ eligible to hold a LAPP under [§ 1853a].” Id., at 18,292 (response to comment 49). On appeal, defendants argue that the NMFS’s conclusion that A16’s sector program is not a LAPP is consistent with the statutory definition of that term and with the provisions of section 1853a. As to the referendum requirement, defendants say the statutory language flatly precludes Lovgren’s interpretation. Plaintiffs argue that the text of the Reauthorization Act compels opposite conclusions on both fronts. The statutory text supports the defendants. 1. Text of the Statute: Elements in the Statutoi’y Definition of a LAPP Defendants’ lead argument is that, under A16’s sector program, “no one — not an individual, a vessel, nor a sector — receives” an allocation that meets each element in the statutory definition of a LAPP. The argument has two components: first, sectors (as a whole) do not receive a “Federal permit,” 16 U.S.C. § 1802(26)(A), as that term is understood in fishery management; and second, while fishermen and their vessels (individually) do receive a “Federal permit,” that alone is not enough because it does not entitle them “to harvest a quantity of fish” for their “exclusive use,” which are also essential elements in the definition of a LAPP. Id., These elements, not present in A16’s sector program, are required in the statutory definitions of both a LAPP and an IFQ. This undercuts all of plaintiffs’ section 1853a claims. We conclude that the statutory definition of a LAPP permits defendants’ construction. We start with the term “Federal permit,” which has an understood meaning in fisheries management. “The understanding of a term employed by Congress is ordinarily determined as of the time of [a statute’s] enactment.” Hernández-Mi randa v. Empresas Díaz Massó, Inc., 651 F.3d 167, 175 (1st Cir.2011). The use of the term “permit” in the federal regulation of fisheries considerably predates the Reauthorization Act. See, e.g., United States v. Kaiyo Maru No. 53, 503 F.Supp. 1075, 1077 (D.Alaska 1980) (foreign fishing permits); Pac. Nw. Generating Coop. v. Brown, 822 F.Supp. 1479 (D.Or.1993) (commercial fishing permits); see also Se. Fisheries Ass’n, Inc. v. Chiles, 979 F.2d 1504, 1507 (11th Cir.1992) (noting that “[t]he fish were caught pursuant to a federal permit”). A “permit” is a document, issued by the Secretary or an authorized federal agency, that authorizes its holder to participate in a federal fishery. See 16 U.S.C. § 1853(b) (authorizing regional councils to “require a permit to be obtained ... [for] any fishing vessel of the United States fishing, or wishing to fish, in [federal waters] ... [or for] the operator of any such vessel”); see also Am. Pelagic Fishing Co. v. United States, 379 F.3d 1363, 1379 (Fed.Cir.2004) (noting that the MSA authorizes “regional councils to require federal permits for U.S. fishermen to fish in any fishery within [federal waters]” (citing 16 U.S.C. § 1853(b)(1))). In a fishery where a permit is required to participate, it is unlawful to fish without one or in a manner inconsistent with a permit’s terms or conditions. 16 U.S.C. § 1857(1)(A)-(B). At least since A5, there has been .a highly regulated permitting system in the Fishery, see Section I.B.l, above, which remains in effect now, 50 C.F.R. § 648.4 (2012). The permits acquired under section 648.4 are issued by the NOAA Regional Administrator through a formal application process. See, e.g., id. § 648.4(a)(l)(i)(B), (I)(l)-(2) (limited access multispecies permits); id. § 648.4(a)(1)(h) (open access permits). The class of permit a vessel holds dictates the manner in which that vessel may fish, and the issued permit must be kept on board the vessel at all times. Id., § 648.4(a)(1). Plaintiffs acknowledge that the ACE allocation made to sectors is not a “Federal permit” under the Fishery’s regulations. New Bedford argues, however, that the appropriate construction of the term “Federal permit,” in relation to the LAPP requirements, is not the document described in these regulations, but the layperson’s meaning of the word “permit.” They offer the following dictionary definition: “1. Permission, esp. in written form. 2. A document for [sic] certificate giving permission to do something; license; warrant,” American Heritage Dictionary (2d. ed. 1976), and reason that the ACE allocation made to sectors qualifies as a “Federal permit” because it is a form of permission. There is no indication that Congress intended the term “Federal permit” to take on a layperson’s notion of any permission under the Reauthorization Act when it has long had a specialized meaning. Indeed, the MSA continues to distinguish “Federal permits” from other forms of permission relating to fishing. See 16 U.S.C. § 1801(b)(7) (identifying the MSA’s purpose of, inter alia, “promot[ing] the protection of essential fish habitat in the review of projects conducted under Federal permits, licenses, or other authorities ” (emphasis added)). New Bedford’s argument to the contrary is misguided. Under traditional rules of statutory construction, “identical words used in different parts of the same [A]ct are intended to have the same meaning.” Dep’t of Revenue of Or. v. ACF Indus., Inc., 510 U.S. 332, 342, 114 S.Ct. 843, 127 L.Ed.2d 165 (1994) (quoting Sorenson v. Sec’y of Treasury, 475 U.S. 851, 860, 106 S.Ct. 1600, 89 L.Ed.2d 855 (1986)) (internal quotation marks omitted). This is particularly true where those words are employed by Congress across multiple amendments to the same statute. See Hernández-Miranda, 651 F.3d at 175 (“The fact that Congress used the same terminology in the 1991 amendments as in [prior amendments to the Civil Rights Act] makes it quite likely ... that it intended to adopt” the same meaning). Here, the term “Federal permit” has been used to describe the document issued in the regulation of IFQs since the Sustainable Fisheries Act in 1996. Several fisheries in the United States had implemented IFQs before 1996 that assigned harvest privileges to fishermen and fishing vessels through a federally regulated permit. See 57 Fed. Reg. 57,130, 57,136 (Dec. 3, 1992) (Alaska Halibut IFQ program: “The annual IFQ allocation ... would be issued to each QS holder in the form of an IFQ permit” (emphasis added)); cf. 56 Fed. Reg. 57,302-03, 57,309 (Nov. 8, 1991) (Atlantic Wreckfish ITQ [“individual transferable quota”]: “Wreckfish may not be possessed on board a fishing vessel — (i) In an amount exceeding the total of the ITQ coupons on board the vessel; (ii) That does not have on board a vessel permit for wreckfish”). The same is true of the use of permits in the regulation of current LAPPs and IFQs. See, e.g., 50 C.F.R. § 660.100 (“The [Pacific coast groundfish] trawl rationalization program creates limited access privileges,” which attach to the permits described in §§ 660.111 (definitions), 660.140 (Shorebased IFQ Program), 660.150 (Mothership Coop Program), and 660.160 (Catcher/processor Coop Program)); id. § 679.4(d)(l)(i) (Alaskan EEZ sablefish and halibut IFQ permits); id. § 680.4(d) (Alaskan EEZ crab IFQ permit). This includes the N.E. Council’s own IFQ program. Id., § 648.4(a)(2)(ii)(A) (Scallop IFQ permit). These programs, all developed with the same language in mind, demonstrate that defendants’ construction of the term “Federal permit” is not prohibited ,- but entirely permissible. Significantly, the analysis cannot end there. The term “Federal permit,” as used in the statutory definition of what constitutes a LAPP, is itself subject to two limiting clauses: the permit must also be “to harvest a quantity of fish” and “for exclusive use by a person.” 16 U.S.C. § 1802(26)(A). These clauses, which also predate the Reauthorization Act, see Pub. L. No. 104-297, Tit. I, § 102, require that, to meet the definition of a LAPP, the permit must allow its recipient, and only its recipient, to catch fish. This too is consistent with the permits issued in the regulation of preexisting LAPPs, which authorize an individual or entity to harvest some portion of a fishery’s TAC, but not true of A16’s sector program. See, e.g., 50 C.F.R. § 679.4(d)(l)(i) (“An IFQ permit authorizes the person identified on the permit to harvest IFQ halibut or IFQ sablefish ... until the amount harvested is equal to the amount specified under the permit....”); id. § 648.53(h)(1) (“For each fishing year of the IFQ program, a vessel issued an IFQ scallop permit may only harvest and land the total amount of scallop meats allocated [to that vessel’s permit] in accordance with this subpart.”); id. § 660.25(e)(l)-(2) (“An MS coop [and C/P coop] permit conveys a conditional privilege to an eligible coop entity to receive and manage a coop’s allocation of designated species and species groups,” subject to the procedures announced in §§ 660.150 and 660.160); see also Pac. Coast Fed’n of Fishermen’s Ass’n v. Locke, No. C 10-04790 CRB, 2011 WL 3443533, at *1 n. 4 (N.D.Cal. Aug. 5, 2011) (“A ‘limited access privilege’ is a federal permit that provides a person an exclusive privilege to harvest a specific portion of a fishery’s total allowable catch.”); Alliance Against IFQs v. Brown, 84 F.3d 343, 345 (9th Cir.1996) (“The basic scheme is that any boat that fishes commercially for the regulated fish in the regulated area must have an individual quota share (IFQ) permit on board, specifying the individual fishing quota allowed for the vessel.... ”). Plaintiffs argue that A16’s PSC allocation meets both of these two additional requirements. Not so. There is no dispute that the PSC assigned to fishermen does not, by itself, allow them to catch any fish. It is only upon joining a sector that a fisherman’s PSC becomes an allocation of catch. Even then, federal defendants emphasize, the quantity of fish an individual member is allowed to harvest is uncertain; sectors may assign individual members an ACE allocation according to the sector’s own preferences, as expressed through a binding management plan. The federal defendants’ conclusion that the A16 sector program does not meet the statutory elements for a LAPP or an IFQ conforms to long-standing regulations governing fisheries and is permissible. 2. The Referendum Requirement and Other Provisions in Section 1853a Turning from the definition of a LAPP/IFQ, the parties point to other provisions in section 1853a to reinforce their respective interpretations as to whether sectors are LAPPs or IFQs. Some of these provisions refer to the N.E. Council’s “sector allocation” program directly, but most offer only indirect clues as to congressional intent. Three provisions in section 1853a directly acknowledge or address the status of “sector allocations.” Defendants argue that nothing in the language of section 1853a itself compels the conclusion that A16’s sector program is a LAPP or an IFQ, and that sectors are plainly exempt from section 1853a’s referendum requirement. We agree. Of central importance to one portion of this appeal is section 1853a’s “sector allocation” exemption from the referendum requirement, which provides that “[i]n this subparagraph, the term ‘individual fishing quota’ does not include a sector allocation.” 16 U.S.C. § 1853a(c)(6)(D)(vi) (emphasis added). There is no dispute that Congress had A13’s sector allocation program in mind when it adopted this language. Plaintiffs argue that while the exemption may apply to A13’s sectors, it does not apply to A16’s sectors. They argue that A16’s sectors are too qualitatively different from their predecessors to fall within the exemption. New Bedford, Lovgren, and FWW each advance different bases for this alleged difference. Collectively, these arguments do not assist their case. The exclusion of sectors from the referendum requirement in section 1853a does not contain the language “identical sector allocation,” “existing sector allocation,” or any of the restrictions plaintiffs would read into it. There is no textual basis for the argument. Further, the core principle, in both A13 and A16, that a sector is a voluntary “allocation proposal for a group of limited access NE multispecies vessels,” 50 C.F.R. § 648.87(a)(1), remains the same. The changes made to sectors from A13 to A16 served only to enhance that core concept, not to render A16’s sectors non-sectors. For this reason, Lovgren’s argument as to the referendum requirement is inconsistent with the text of the Reauthorization Act. Plaintiffs’ second line of argument, again not based on the statutory text, is that A16’s sector program comes so close to meeting the statutory definition of a LAPP that Congress must have meant for the protective measures of section 1853a to apply. The federal defendants justifiably rejected this view. Sectors were one of several organization-based management systems in use when Congress passed the Reauthorization Act. The text of the Reauthorization Act shows that Congress was well aware of sectors and other collective fishing programs and it chose to treat some differently than others. Section 1853a specifically identifies two collective entities, “fishing communities” and “regional fishery associations” (“RFAs”), as eligible to participate in a LAPP, and it sets out criteria governing both. See 16 U.S.C. § 1853a (c)(3)-(4) (fishing communities and RFAs, respectively). In contrast, there is no comparable provision addressing the eligibility of sectors to participate in a LAPP. Absent such an instruction, and in light of the considerable support for the NMFS’s interpretation, we cannot conclude that the Act mandates the conclusion that A16’s sector program is a LAPP or an IFQ. B. Administrative Deference Having found that the Reauthorization Act does not foreclose the agency’s interpretation, we turn to the issue of administrative deference. At this stage, the parties agree that some deference is in order, but differ as to its appropriate level. Plaintiffs argue that, at most, the NMFS is entitled to Skidmore and not Chevron deference. We disagree and spell out why. “The fair measure of deference to an agency administering its own statute has been understood to vary with circumstances .... ” Mead, 533 U.S. at 228, 121 S.Ct. 2164. Where it appears “that Congress delegated authority to the agency generally to make rules carrying the force of law, and that the agency interpretation claiming deference was promulgated in the exercise of that authority,” the agency is entitled to deference under Chevron. Id., at 226-27, 121 S.Ct. 2164. Statutes often contain gaps, and “[flilling these gaps ... involves difficult policy choices that agencies are better equipped to make than courts.” Nat’l Cable & Telecomms. v. Brand X Internet Servs., 545 U.S. 967, 980, 125 S.Ct. 2688, 162 L.Ed.2d 820 (2005). Accordingly, Chevron requires courts to accept an agency’s gap-filling interpretation so long as it is reasonable. Mead, 533 U.S. at 229, 121 S.Ct. 2164. However, where an agency’s interpretation is announced in a manner that lacks the force of law, Chevron deference may be inappropriate. See, e.g., Christensen v. Harris County, 529 U.S. 576, 587, 120 S.Ct. 1655, 146 L.Ed.2d 621 (2000) (“Interpretations such as those in opinion letters .. policy statements, agency manuals, and enforcement guidelines, all of which lack the force of law, do not warrant Chevron-style deference.”). Such interpretations are generally subject to review under Skidmore v. Swift & Co., 323 U.S. 134, 65 S.Ct. 161, 89 L.Ed. 124 (1944), and are accorded deference in proportion to their “power to persuade.” Id., at 140, 65 S.Ct. 161. Congress has expressly delegated responsibility to NMFS to implement FMPs through binding regulations. See 16 U.S.C. §§ 1854(a)-(c), 1855(b). The trio of regulations implementing A16 were issued pursuant to this authority and they were subject to extensive notice-and-comment rulemaking. This creates a strong presumption in favor of applying Chevron deference to the challenged interpretation. See Doe v. Leavitt, 552 F.3d 75, 79 (1st Cir.2009) (noting that the Supreme Court “contemplated the application of Chevron deference to most statutory interpretations that are the fruit of notice-and-comment rulemaking”). Plaintiffs argue, however, that this presumption based on notice-and-comment rulemaking is inappropriate in this case. New Bedford, American Alliance, and FWW argue that the NMFS reached its interpretation internally, i.e., before and without the benefit of public comment. Specifically, plaintiffs rely on a September 2007 letter, identified in a single reference in A16’s final rule, in which the NMFS advised the N.E. Council that section 1853a’s provisions did not apply to the sector program. 75 Fed. Reg. at 18,292 (response to comment 49). Plaintiffs contend, inaccurately, that this letter, which was not subject to notice-and-comment rulemaking, was defendants’ only reasoned discussion of the status of sectors and the basis for the NMFS’s interpretation. We reject the argument. As recounted earlier, the NMFS twice addressed the status of sectors in A16’s final rule. See Section III A, above. The first discussion appears in the NMFS’s direct overview of A16’s sector program, and it does not refer to the September 2007 letter at all. 75 Fed. Reg. at 18,275. That discussion articulates the same permit-based argument presently at issue for distinguishing the ACE allocation issued to sectors from a LAPP. It is only in the second discussion that the NMFS refers to the September 2007 letter. Even there, the agency did not rely on the letter. Instead, the NMFS clarified that it “has determined, as explained in a September 1, 2007, letter to the [N.E.] Council, that the sector program, as currently implemented in the FMP, is neither an IFQ program, nor a LAPP program.” Id., at 18,292 (response to comment 49) (emphasis added). The NMFS goes on to note that “none of the revisions to the current sector program in this final rule change the conclusions reached in that letter.” Id. New Bedford next argues that even if the NMFS addressed its interpretation in A16’s final rule, that was not enough: the agency should have included the discussions in Alb’s proposed rule, which defendants concede they did not. This argument is without basis. To the extent New Bedford is suggesting there was a lack of notice, the record is to the contrary. The issue arose several times during A16’s three-year development, and public comments throughout this process indicate that the Fishery’s participants, including several parties to this appeal, were aware of the Agency’s position. AR 051608-04 (New Hampshire Commercial Fishermen’s Association); AR 032203-05 (Lovgren); AR 050496 (FWW). Further, the N.E. Council formally announced its interpretation in the version of A16 submitted to the NMFS for approval, which was also subject to notice and comment. See 74 Fed. Reg. 54,773 (Oct. 23, 2009). The fact that the NMFS listened to the public comments, realized some confusion remained, and stated the reasons for its views hardly shows non-compliance with the MSA, see 16 U.S.C. §§ 1854(b), 1855(d), or with notice-and-comment rulemaking. There is no basis to reject Chevron deference. Other circuits have also rejected similar arguments. See, e.g., Trout Unlimited v. Lohn, 559 F.3d 946, 954 (9th Cir.2009) (applying Chevron deference to NMFS policy subject to “formal notice-and-comment process ” (emphasis added)); Sierra Club v. U.S. Fish & Wildlife Serv., 245 F.3d 434, 440-41 (5th Cir.2001) (same). C. Reasonableness of the Interpretation Chevron directs us to defer to the agency’s interpretation unless that interpretation is unreasonable. Mayo Found. for Med. Educ. & Research, 131 S.Ct. at 715. We have already explained why the record demonstrates that the NMFS engaged in reasoned decisionmaking and reached rational outcomes to hard choices. The agency has articulated a statutorily permissible basis for distinguishing A16’s sector program from a LAPP, and so from compliance with section 1853a. This interpretation was reached through notice-and-comment rulemaking and conforms to over two decades of regulations governing federal fisheries. Plaintiffs and their amici argue that regardless, A16 is unreasonable because the requirements of section 1853a should be read to protect fishermen and fishing communities from any and all management systems that might encourage consolidation or drive smaller fishing businesses out of the industry. Two points are worth making. First, whether A16’s sector program in fact encourages consolidation or exerts particular pressure on small fishermen is itself disputed, and some contend that it provides greater protection against both than the alternatives. Second, defendants have opened the door to consider the concerns plaintiffs raise in their development of future FMPs. See Section V, below. In any event, “[w]hen a challenge to an agency construction of a statutory provision, fairly conceptualized, really centers on the wisdom of the agency’s policy ... the challenge must fail.” Chevron, 467 U.S. at 866, 104 S.Ct. 2778. Where, as here, “the regulatory scheme is technical and complex, the agency considered the matter in a detailed and reasoned fashion, and the decision involves reconciling conflicting policies,” we must defer to the agency’s conclusions. Id., at 865, 104 S.Ct. 2778 (footnotes omitted). We reject the challenges. IV. Plaintiffs make a separate argument that A16 is not consistent with the MSA’s ten national standards, as announced at 16 U.S.C. § 1851(a)(l)-(10), particularly Standards 1, 4 and 8. These standards are broadly worded statements of the MSA’s objectives for all fishery conservation and management measures. The purposes of the national standards are many, and can be in tension with one another. See Div. of Marine Fisheries, 170 F.3d at 30 (recognizing that “some [of the national standards] are potentially in tension with others”). Compliance with the national standards requires balancing by the agency and the exercise of discretion and judgment. See Alliance Against IFQs, 84 F.3d at 350. That being so, “we will uphold a regulation against a claim of inconsistency with a ‘national standard’ under § 1851 if the Secretary had a ‘rational basis’ for it.” Or. Trollers Ass’n, 452 F.3d at 1119. “What matters is that the administrative judgment, right or wrong, derives from the record, possesses a rational basis, and evinces no mistake of law.” Associated Fisheries, 127 F.3d at 111. The Secretary’s judgments here were derived from the record, rational, and not based on any error of law. A. National Standard 1: “Overfishing” and “Optimum Yield ” The Fishery is made up of different stocks of fish, some eleven of which are badly overfished. AR 018987 (GARM III results). Under the Reauthorization Act, the N.E. Council had a two-year window to adopt an FMP that would “end overfishing immediately,” 16 U.S.C. § 1854(e)(3)(A), and rebuild affected stocks in “as short [a time] as possible,” id. § 1854(e)(4)(A)(i). To meet these mandates, A16 established new ACLs, or catch limits, for each of the Fishery’s stocks, at levels that the Council reasoned would rebuild most overfished stocks within four to six years. To ensure that these limits were not exceeded, A16 also provided that once an ACL was reached for a particular stock, all fishing activity in that stock had to cease. Further, any fishing overages would be subtracted from a stock’s ACL in the following fishing year. See 75 Fed. Reg. at 18,267-68. This strategy necessarily had consequences. Most fishing gear is not selective as to what it brings up and will catch a wide range of stocks. So, when the ACL for a particular stock is reached, if some incidental catch of that stock cannot be avoided in the catching of other stock, it can mean that fishing in other, healthier stocks with that gear ends too, in order to avoid depletion of the endangered stock. Defendants were candid that A16