41 CFR § 301-51.6
How may I pay for official travel expenses if I receive an exemption from use of the Government contractor-issued travel charge card?
June 9, 2020
If you receive an exemption from use of the Government contractor-issued travel charge card, your agency may authorize one or a combination of the following methods of payment:
(a) Personal funds, including cash or personal charge card;
(b) Travel advances; or
(c) Government Transportation Request (GTR).
Note to §301-51.6: City pair contractors are not required to accept payment by the methods in paragraph (a) or (b) of this section.
[FTR Amdt. 90, 65 FR 3055, Jan. 19, 1998. Redesignated and amended by FTR Amdt. 2016-01, 81 FR 63138, Sept. 14, 2016]