; and (B) during such 2-year period— (i) requirements relating to the Great Lakes Pilotage Advisory Committee established by this section shall be treated as satisfied by the substantially similar advisory committee; and (ii) the enactment of this section shall not be the basis— (I) to deem, find, or declare such committee, including the charter, membership, and other aspects thereof, void, not in force, or not in effect; (II) to suspend the activities of such committee; or (III) to bar the members of such committee from a meeting. 307. Expired maritime liens Section 31343(e) of title 46, United States Code, is amended— (1) by inserting (1) before A notice ; and (2) by inserting after paragraph (1), as so designated by this section, the following: (2) On expiration of a notice of claim of lien under paragraph (1), the Secretary shall remove such expired notice. . 308. Offshore navigation (a) Port access routes Section 70003(e) of title 46, United States Code, is amended— (1) in paragraph (3), by striking continues; and and inserting continues; ; (2) in paragraph (4), by striking the period at the end and inserting ; and ; and (3) by adding at the end the following: (5) shall, unless otherwise authorized by the Secretary, and notwithstanding any other provision of this chapter, require— (A) a 2-nautical-mile buffer between the parallel outer or seaward boundary of a traffic lane and any offshore structure affixed to the submerged land of the Outer Continental Shelf; and (B) a 5-nautical-mile buffer between the entry or exit of any traffic separation scheme and any offshore structure. . (b) Navigation