; 49 U.S.C. 30301 note) shall not apply to an individual who provides to the Transportation Security Administration the Known Traveler Number assigned to such individual through such individual’s flight reservation. (2) Definition In this section, the term Known Traveler Number means a number assigned to an individual and accepted by the Transportation Security Administration as validating that the individual holding such identifier is a member of a known low-risk population, such as TSA’s PreCheck trusted traveler program or U.S. Customs and Border Protection’s Global Entry program. (3) Effective date The exemption described in paragraph (1) shall take effect and apply beginning on October 1, 2020. (b) Public awareness (1) In general Notwithstanding any other provision of law, the Administrator of the Transportation Security Administration shall, beginning on October 1, 2020, accept enrollment in PreCheck as an allowable alternative to presenting a REAL ID compliant credential to board a commercial aircraft. This authorization provided under this subsection shall terminate on April 1, 2022. (2) Traveler notification To the extent possible, beginning on the date of the enactment of this Act, the Secretary of Homeland Security shall inform travelers of the exemption described in subsection (a). (3) Public awareness campaign Beginning on the date of the enactment of this Act, the Administrator of the Transportation Security Administration shall engage transportation stakeholders, including air carriers and ticket agents (as such terms are defined in section 40102 of title 49, United States Code) and airport operators, in a coordinated effort to inform the public about pending REAL ID implementation requirements. (c) Alternative procedures Not later than October 1, 2020, the Administrator of the Transportation Security Administration, in consultation with relevant transportation security stakeholders, shall develop, socialize, and implement alternative checkpoint screening procedures for individuals arriving at a