; or (iv) is estuarine habitat designated as essential fish habitat under the Magnuson-Stevens Fishery Conservation and Management Act ( 16 U.S.C. 1601 et seq.). (b) Guidelines The Administrator, in consultation with the interagency working group, shall, not later than 1 year after the date of enactment of this Act, establish by regulation guidelines based on the best available science to describe and identify coastal carbon areas of significance and measures to ensure the protection of coastal carbon areas of significance. (c) Review and update The Administrator, in consultation with the interagency working group, shall review and update guidelines established under subsection (b) not less frequently than once every 5 years or when new information warrants such an update. (d) Schedule The Administrator, in consultation with the interagency working group, shall establish a schedule for the identification of coastal carbon areas of significance under subsection (b) and for reviews and updates under subsection (c), and shall make initial designations of a coastal carbon area of significance in each coastal State not later than 1 year after the date of enactment of this Act. (e) Recommendations and information The Administrator, in consultation with the interagency working group, shall, with respect to each coastal carbon area of significance, provide recommendations and information regarding the adverse impacts and threats to the carbon storage, ecosystem services, and habitat capacity of the area, and the actions that should be considered to avoid adverse impacts and ensure the conservation and enhancement of that area. (f) Programs administered by the Secretary of Commerce The Administrator, in consultation with the interagency working group, shall use programs administered by the Secretary of Commerce to carry out this section and ensure the conservation and enhancement of each coastal carbon area of significance. (g) Requirements for Federal actions With respect to any proposed agency action that has the