Pub. L. 110-161, div. E, tit. V, sec. 571

Sec. 571. Effective no later than ninety days after the date of enactment of this Act, the Transportation Security Administration shall permit approved members of Registered Traveler programs to satisfy fully the required identity verification procedures at security screening checkpoints by presenting a biometrically-secure Registered Traveler card in lieu of the government-issued photo identification document required of non-participants: Provided, That if their identity is not confirmed biometrically, the standard identity and screening procedures will apply: Provided further, That if the Assistant Secretary (Transportation Security Administration) determines this is a threat to civil aviation, then the Assistant Secretary (Transportation Security Administration) shall notify the Committees on Appropriations of the Senate and House of Representatives five days in advance of such determination and require Registered Travelers to present government-issued photo identification documents in conjunction with a biometrically-secure Registered Traveler card.