; and (2) not later than 180 days after the date of submission of the report under paragraph (1), initiate a rulemaking activity or make such policy and guidance updates necessary to address any consensus recommendations reached by the aviation rulemaking committee established pursuant to subsection (a), as determined appropriate by the Administrator. 350. Secondary cockpit barriers (a) In general Not later than 6 months after the date of enactment of this Act, the Administrator shall convene an aviation rulemaking committee to review and develop findings and recommendations to require installation of a secondary cockpit barrier on commercial passenger aircraft operated under the provisions of part 121 of title 14, Code of Federal Regulations, that are not captured under another regulation or proposed regulation. (b) Membership The Administrator shall appoint a chair and members of the rulemaking committee convened under subsection (a), which shall be comprised of at least 1 representative from the constituencies of— (1) mainline air carriers; (2) regional air carriers; (3) aircraft manufacturers; (4) passenger aircraft pilots represented by a labor group; (5) flight attendants represented by a labor group; (6) airline passengers; and (7) other stakeholders the Administrator determines appropriate. (c) Considerations The aviation rulemaking committee convened under subsection (a) shall consider— (1) minimum dimension requirements for secondary barriers on all aircraft types operated under part 121 of title 14, Code of Federal Regulations; (2) secondary barrier performance standards manufacturers and air carriers must meet for such aircraft types; (3) the availability of certified secondary barriers suitable for use on such aircraft types; (4) the development, certification, testing, manufacturing, installation, and training for secondary barriers for such aircraft types; (5) flight duration and stage length; (6) the location of lavatories on such aircraft as related to operational complexities