NMFS announces final specifications for the 2005 fishing year for the Atlantic mackerel, squid, and butterfish (MSB) fisheries. This action also implements a 3.0-inch (7.62-cm) minimum codend mesh size requirement for butterfish otter trawl trips greater than 5,000 lb (2,268 kg). In addition, this action includes three regulatory language changes that reflect previously approved measures in the FMP. The intent of this final rule is to promote the development and conservation of the MSB resource.