1. Short title This Act may be cited as the Marine Fisheries Habitat Protection Act . 2. Use of certain offshore oil and gas platforms and pipelines for artificial reefs (a) National Fishing Enhancement Act of 1984 The National Fishing Enhancement Act of 1984 ( 33 U.S.C. 2101 et seq. ) is amended— (1) by amending section 206 ( 33 U.S.C. 2105 ) to read as follows: 206. Definitions In this title: (1) Artificial reef The term artificial reef means a structure which is constructed or placed in waters covered under this title for the purpose of enhancing fishery resources and commercial and recreational fishing opportunities. (2) Decommissioning The term decommissioning mean ending oil, gas, or sulphur operations on an offshore lease, right-of-way, or right-of-use and easement and returning the area subject to such lease, right-of-way, or right-of-use and easement to a condition that complies with applicable law, including by removing caissons and idle structures. (3) Established reef ecosystem The term established reef ecosystem means an area with identified reef-associated species, including species of corals, crustaceans, or fish that are managed under— (A) a fishery management plan of the National Oceanic and Atmospheric Administration; or (B) a State management plan for reef-associated species. (4) Idle structure The term idle structure means— (A) an oil or gas pipeline, and associated equipment and infrastructure, that the Secretary of the Interior has determined is no longer useful for operations; and (B) an offshore oil and gas platform or similar structure, and associated equipment and infrastructure, that is no longer useful for operations, as determined by the Secretary of the Interior. (5) Partial removal The term partial removal means— (A) the severance of the top portion of a structure at a level appropriate to maintain navigational safety, as determined by the Secretary of the Interior in consultation with the Commandant of the Coast Guard