41 CFR § 301-10.263
What travel authorization documents must I present to the aircraft management office that operates the Government aircraft?
June 9, 2020
You must present to the aircraft management office that operates the Government aircraft—
(a) A copy of your written travel authorization, including a blanket travel authorization, if applicable, approved in accordance with §301-10.262; and
(b) Valid picture identification, such as a Government identification card or a state-issued driver's license.
[FTR Amdt. 2004-02, 69 FR 34304, June 21, 2004]