NMFS announces that the U.S. purse seine fishery on the high seas in the area of application of the Convention on the Conservation and Management of Highly Migratory Fish Stocks in the Western and Central Pacific Ocean (Convention) between the latitudes of 20[deg] N and 20[deg] S will close as a result of reaching the 2018 limit on purse seine fishing effort in that area. This action is necessary for the United States to implement provisions of a conservation and management measure adopted by the Commission for the Conservation and Management of Highly Migratory Fish Stocks in the Western and Central Pacific Ocean (WCPFC or Commission) and to satisfy the obligations of the United States under the Convention, to which it is a Contracting Party.