NMFS is notifying the owners and operators of registered vessels of their assignments for the 2010 A season Atka mackerel fishery in harvest limit area (HLA) 542 and/or 543 of the Aleutian Islands subarea of the Bering Sea and Aleutian Islands management area (BSAI). This action is necessary to allow the harvest of the 2010 A season HLA limits established for area 542 and area 543 pursuant to the final 2009 and 2010 harvest specifications for groundfish in the BSAI.