39 C.F.R. § 501.4 Burden of proof standard.
Title 39 - Postal Service
The burden of proof is on the Postal Service in adjudications of suspension and revocation under §§501.5 and 501.12 and administrative sanctions under §§501.14 and 501.23. Except as otherwise indicated in those sections, the standard of proof shall be the preponderance-of-evidence standard.
Title 39: Postal Service
PART 501—AUTHORIZATION TO MANUFACTURE AND DISTRIBUTE POSTAGE METERS
§ 501.4 Burden of proof standard.