41 CFR § 102-118.215
May my agency pay a TSP any extra fees to pay for the preparation and use of the GBL or GTR?
June 9, 2020
No, your agency must not pay any additional charges for the preparation and use of the GBL or GTR. Your agency may not pay a TSP a higher rate than comparable under commercial procedures for transportation bought on a GBL or GTR.