NMFS issues a final rule to modify the Individual Fishing Quota (IFQ) Program for the fixed-gear commercial Pacific halibut fishery and sablefish fishery by revising regulations governing the use of commercial halibut quota share (QS) and the processing of non-IFQ species when processed halibut is onboard a vessel. This action amends current regulations to allow persons holding category A halibut QS to process IFQ regardless of whether a QS holder with unused category B, C, or D halibut QS is onboard the vessel. This action also allows catcher/processor vessels to process non-IFQ species regardless of whether any processed IFQ species is onboard the vessel. This action is necessary to improve the efficiency of fishermen fishing on catcher/ processor vessels. The action is intended to allow halibut QS holders greater flexibility in using their QS, allow use of crew who hold unused category B, C, or D halibut QS while onboard a category A halibut QS vessel, and increase the product quality of non-IFQ species harvested incidentally to IFQ halibut.