; (2) an action necessary to respond to an emergency threatening life, property, or the environment, or an activity necessary for a national security or law enforcement purpose; and (3) scientific exploration or research activities, subject to such terms and conditions as the Secretaries consider necessary for the care and management of the living and nonliving marine resources of the Conservation Area. (d) Analysis The Administrator shall, every two years, conduct an analysis and provide recommendations to each Regional Fishery Management Council established under 302 of the Magnuson-Stevens Fishery Conservation and Management Act ( 16 U.S.C. 1852 ) as to whether any additional area should be protected by a prohibition on the use of gear in contact with the ocean bottom, and towed from a vessel, which is moved through the water during fishing in order to capture fish, including otter trawls, beam trawls, hydraulic dredges, non-hydraulic dredges, and seines (with the exception of a purse seine). 205. Marine biodiversity gap analysis (a) In general Not later than 90 days after the date of enactment of this Act, the Secretary of Commerce and the Secretary of the Interior, in coordination with relevant Federal and State agencies, shall begin a marine biodiversity gap analysis meeting the requirements described in subsection (b) to be completed not later than 18 months after such date. Such Secretaries, in coordination with relevant Federal and State agencies, shall update such analysis not less frequently than every 2 years thereafter. (b) Requirements The requirements of this subsection are that the Marine Biodiversity Gap Analysis shall— (1) be consistent with the policy set out in section 201; (2) assess habitats, species, and ecosystems across the United States ocean waters and coasts; and (3) determine what types of habitats, species, and ecosystems and the percentage of each type of habitat, species, and ecosystem are necessary to protect in order to— (A) protect biodiversity