Editorial Note on Part 660
Editorial Note: Nomenclature changes to part 660 appear at 67 FR 65906, Oct. 29, 2002, 88 FR 81358, Nov. 22, 2023.

§ 660.410 Conservation objectives, ACLs, and de minimis control rules. ( a ) *Conservation objectives.* Annual management measures will be consistent with conservation objectives described in Table 3-1 of the Salmon FMP or as modified through the processes described below, except where the ACL escapement level for a stock is higher than the conservation objective, in which case annual management measures will be designed to ensure that the ACL for that stock is met, or where the de minimis control rules described in paragraph (c) of this section apply. ( 1 ) *Modification of conservation objectives.* NMFS is authorized, through an action issued under § 660.411, to modify a conservation objective if— ( i ) A comprehensive technical review of the best scientific information available provides conclusive evidence that, in the view of the Council, the Scientific and Statistical Committee, and the Salmon Technical Team, justifies modification of a conservation objective or
( ii ) Action by a Federal court indicates that modification of a conservation objective is appropriate.
( 2 ) *ESA-listed species.* The annual specifications and management measures will be consistent with NMFS consultation standards or NMFS recovery plans for species listed under the Endangered Species Act (ESA). Where these standards differ from those described in FMP Table 3-1, NMFS will describe the ESA-related standards for the upcoming annual specifications and management measures in a letter to the Council prior to the first Council meeting at which the development of those annual management measures occurs.
( b ) *Annual Catch Limits.* Annual management measures will be designed to ensure escapement levels at or higher than ACLs determined through the procedures set forth in the FMP.
( c ) *De minimis control rules.* Klamath River fall Chinook (KRFC) and Sacramento River fall Chinook salmon have the same form of *de minimis* control rule described in the Salmon FMP, which allows for limited fishing impacts when abundance falls below SMSY (the abundance of adult spawners that is expected, on average, to produce MSY). The control rule describes maximum allowable exploitation rates at any given level of abundance. The annual management measures may provide for lower exploitation rates as needed to address uncertainties or other year-specific circumstances. The *de minimis* exploitation rate in a given year must also be determined in consideration of the following factors: ( 1 ) The potential for critically low natural spawner abundance, including considerations for substocks that may fall below crucial genetic thresholds;
( 2 ) Spawner abundance levels in recent years;
( 3 ) The status of co-mingled stocks;
( 4 ) Indicators of marine and freshwater environmental conditions;
( 5 ) Minimal needs for Tribal fisheries;
( 6 ) Whether the stock is currently in an approaching overfished condition;
( 7 ) Whether the stock is currently overfished;
( 8 ) Other considerations, as appropriate; and
( 9 ) Exploitation rates, including *de minimis* exploitation rates, must not jeopardize the long-term capacity of the stock to produce maximum sustained yield on a continuing basis. NMFS expects that the control rule and associated criteria will result in decreasing harvest opportunity as abundance declines and little or no opportunity for harvest at abundance levels less than half of the maximum stock size threshold (MSST).
( d ) *Salmon fisheries affecting California Coastal Chinook.* Salmon fisheries off the coast of California affecting this ESA-listed stock are managed to meet the conservation objective described in Salmon FMP table 3-1. ( 1 ) The annual specifications and management measures will include an allowable harvest level expressed in numbers of Chinook salmon for the salmon fisheries off the coast of California that is projected, using the Klamath Ocean Harvest Model and Sacramento Harvest Model, to ensure fisheries do not exceed the conservation objective. A harvest rate that is lower than the conservation objective may be used to determine the allowable harvest level in order to address the potential for exceeding the objective in a particular year. The lower harvest rate will be determined in two steps. ( i ) In the first step, NMFS and the Council will calculate the average percent error (defined as the difference between the preseason projected HR and the post-season estimated HR, divided by the post-season estimated HR, and expressed as a percentage) averaged over the most recent 5 years, and apply the average percent error to the conservation objective. Only positive percent error will be applied because the intent is to keep the post-season harvest rate below the conservation objective.
( ii ) In the second step, other relevant factors affecting the preseason assessment of the age-4 KRFC harvest rate will be considered, such as revisions to the fishery management models used to estimate the preseason Chinook catch, environmental indicators relevant to the status of KRFC, constraints on fisheries under consideration for the areas and months with greatest impacts to KRFC Chinook, and the lower harvest rate may be modified based on these factors.
( 2 ) The annual specifications and management measures will include the following management measures to ensure fisheries affecting California Coastal Chinook do not exceed the allowable harvest level. ( i ) Landing and possession limits will be used in the commercial troll fisheries to keep fishery catch within the allowable harvest level. Landing and possession limits will be set for periods not to exceed 1 week. Landing and possession limits may vary from one calendar month to the next but will be the same for periods within the same calendar month.
( ii ) A percentage of the allowable harvest level (*i.e.,* trigger) that will require consideration of inseason action to ensure that the allowable harvest level is not exceeded will be set through the annual management measures.
( iii ) For the first 2 years after the promulgation of this rule in which a salmon fishery occurs in the EEZ off the California coast, inseason actions will only be used to further restrict harvest (*i.e.,* reduce landing limits, reduce time/area, and close the fishery when the allowable harvest level is projected to have been met).
( 3 ) Electronic fish tickets must be submitted within 24 hours of landing to the California Department of Fish and Wildlife. Fish tickets must be submitted in accordance with the requirements of the applicable State regulations.
( 4 ) NMFS will implement inseason actions as described in § 660.409, following processes described in that section, as needed to ensure catch in the fishery does not exceed the allowable harvest level and will close areas and seasons upon reaching the allowable harvest limit.
[76 FR 81860, Dec. 29, 2011, as amended at 89 FR 66014, Aug. 14, 2024]