NMFS is notifying the owners and operators of registered vessels of their assignments for the 2009 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 2009 A season HLA limits established for area 542 and area 543 pursuant to the 2008 and 2009 harvest specifications for groundfish in the BSAI.