; and (12) shall ensure that the seating arrangements of Federal air marshals on aircraft are determined in a manner that is risk-based and most capable of responding to current threats to aviation security. . (2) Briefing Not later than 270 days after the date of enactment of this Act, the Administrator shall brief the appropriate committees of Congress on the Federal Air Marshal Service's compliance with the requirements under paragraphs (9) through (12) of section 44917(a) of title 49, United States Code, as added by this Act, and the documented methodology used by the Federal Air Marshal Service to conduct risk assessments in accordance with such paragraphs. (3) Implementation deadline Not later than 180 days after the date of enactment of this Act, the Administrator shall begin implementing the requirements under paragraphs (9) through (12) of section 44917(a), United States Code, as added by this Act. 1960. Crew member self-defense training The Administrator, in consultation with the Administrator of the Federal Aviation Administration, shall continue to carry out and encourage increased participation by air carrier employees in the voluntary self-defense training program under section 44918(b) of title 49, United States Code. 1961. Flight deck safety and security (a) Threat assessment Not later than 90 days after the date of enactment of this Act, the Administrator, in consultation with the Administrator of the Federal Aviation Administration, shall complete a detailed threat assessment to identify any safety or security risks associated with unauthorized access to the flight decks on commercial aircraft and any appropriate measures that should be taken based on the risks. (b) RTCA report The Administrator, in coordination with the Administrator of the Federal Aviation Administration, shall disseminate RTCA Document (DO–329) Aircraft Secondary Barriers and Alternative Flight Deck Security Procedure to aviation stakeholders, including air carriers and flight crew, to convey effective methods and best