41 CFR § 304-1.2
Under what authority may I accept payment of travel expenses from a non-Federal source?
June 9, 2020
Under the authority of this part and 31 U.S.C. 1353, you may accept payment of travel expenses from a non-Federal source on behalf of your agency, but not on behalf of yourself, when specifically authorized to do so by your agency and only for official travel to a meeting. Except as provided in §304-3.13 of this subchapter, your agency must approve acceptance of such payments in advance of your travel.