NMFS issues this final rule to implement measures contained in Framework Adjustment 18 to the Northeast Multispecies Fishery Management Plan (FMP). Framework Adjustment 18 allows pelagic midwater trawling for herring and mackerel in Multispecies Closed Areas I and II, the Gulf of Maine (GOM) multispecies closure areas, and in the Nantucket Lightship Closed Area, under certain conditions. The intent of this rule is to provide greater economic opportunity for pelagic midwater trawl vessels to harvest herring and mackerel while maintaining the conservation benefits of the current multispecies management measures.