The travel authorizing/approving official or his/her designee (e.g., supervisor of the traveler) must review and sign travel claims to confirm the authorized travel.
Code of Federal Regulations
[FTR Amdt. 70, 63 FR 15974, Apr. 1, 1998, as amended by FTR Amdt. 2007-05, 72 FR 61539, Oct. 31, 2007]