NMFS amends the regulations governing the Atlantic bluefin tuna (ABT) fisheries to provide authority for NMFS to close and/or reopen all or part of the Angling category in order to provide for equitable distribution of fishing opportunities throughout the species range. The regulatory amendments are necessary to increase the geographic and temporal scope of data collection from the scientific monitoring quota established for the United States under the international ABT stock recovery program. Additionally, this rule allows a more equitable geographic and temporal distribution of fishing opportunities for all fishermen in the Angling category, thus furthering domestic management objectives for the Atlantic tuna fisheries.