41 CFR § 301-73.201
What method of payment may be used for contract passenger transportation service?
June 9, 2020
GSA individual Government contractor-issued travel charge card(s), or your agency centrally billed or other established account, or a GTR (when no other option is available or feasible).
[FTR Amdt. 70, 63 FR 15978, Apr. 1, 1998; 63 FR 35538, June 30, 1998]