Yes, all transportation bills and payment records, whether they are electronic or paper, must undergo a prepayment audit with the following exceptions:

(a) Your agency's prepayment audit program uses a statistical sampling technique of the bills. If your agency chooses to use statistical sampling, all bills must be

(1) At or below the Comptroller General specified limit of $2,500.00 (31 U.S.C. 3521(b)); and

(2) In compliance with the U.S. Government Accountability Office Using Statistical Sampling (GAO/PEMD-10.1.6), Rev. 1992, Chapter 7 Random Selection Procedures obtainable from http://www.gao.gov; or

(b) The Administrator of General Services grants your agency a specific exemption from the prepayment audit requirement which may include bills determined to be below your agency's threshold, mode or modes of transportation, or for an agency or subagency.