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In 2012, NMFS and U.S. Fish and Wildlife Service (USFWS; collectively, the Services) were petitioned to identify and list distinct population segments (DPSs) of green sea turtles under section 4 of the Endangered Species Act (ESA; 16 U.S.C. 1533). In 2016, the Services listed six DPSs of green sea turtles occurring in U.S. waters, which triggered the requirement, under ESA section 4, to designate critical habitat to the maximum extent prudent and determinable for those DPSs. The Services did not do so within the statutory deadline, and subsequently entered into a settlement agreement to submit to the Office of the Federal Register for publication a proposed determination concerning the designation of critical habitat for the six DPSs by June 30, 2023. The rule would propose to designate critical habitat containing reproductive, migratory, foraging and resting features in waters from 0 to 20 m depth. The economic impact will affect Federal agencies, who are required under section 7 of the ESA to consult with the Services on their actions that may affect listed species and designated critical habitat. NMFS is working with the Department of Defense and Department of Homeland Security to review potential national security impacts.