; (2) by redesignating subsections (d) and (e) as subsections (b) and (c), respectively; (3) in subsection (b)(1)(A) (as so redesignated)— (A) in clause (i)(I) by striking self-standing or and inserting a meteorological evaluation tower or tower ; and (B) in clause (ii)— (i) in subclause (IV) by striking or at the end; (ii) in subclause (V) by striking the period at the end and inserting a semicolon; and (iii) by adding at the end the following: (VI) is located within the right-of-way of a rail carrier, including within the boundaries of a rail yard, and is used for a railroad purpose; (VII) is determined by the Administrator to pose no hazard to air navigation; or (VIII) has already mitigated any hazard to aviation safety in accordance with Federal Aviation Administration guidance or as otherwise approved by the Administrator. ; and (4) in subsection (c) (as so redesignated)— (A) by striking paragraph (1) and inserting the following: (1) develop a database that contains the location and height of each covered tower that, pursuant to subsection (a), the owner or operator of such tower elects not to mark, except that meteorological evaluation towers shall be marked and contained in the database; ; (B) in paragraph (3) by striking and at the end; (C) in paragraph (4) by striking the period at the end and inserting a semicolon; and (D) by adding at the end the following: (5) ensure that the tower information in the database is de-identified and that the information only includes the location and height of covered towers; and (6) make the database available for use not later than 1 year after the date of enactment of the FAA Reauthorization Act of 2018 . . 307. Cabin evacuation (a) Review The Administrator of the Federal Aviation Administration shall review— (1) evacuation certification of transport-category aircraft used in air transportation, with regard to— (A) emergency conditions, including impacts into water; (B) crew procedures used for evacuations under actual emergency conditions