; (2) how and when the Administration will engage airports and communities in performance-based navigation proposals; and (3) lessons learned from NextGen projects and pilot programs and how those lessons learned are being integrated into community involvement practices for future NextGen projects located in metroplexes. 161. Critical habitat on or near airport property (a) Federal agency requirements The Secretary of Transportation, to the maximum extent practicable, shall work with the heads of appropriate Federal agencies to ensure that designations of critical habitat, as that term is defined in section 3 of the Endangered Species Act of 1973 ( 16 U.S.C. 1532 ), on or near airport property do not— (1) result in conflicting statutory, regulatory, or Federal grant assurance requirements for airports or aircraft operators; (2) interfere with the safe operation of aircraft; or (3) occur on airport-owned lands that have become attractive habitat for a threatened or endangered species because such lands— (A) have been prepared for future development; (B) have been designated as noise buffer land