41 C.F.R. §102-34.320
Note to § 102-34.320: OMB Circular A-123, Appendix B, contains additional specific guidance on the management, issuance, and usage of Government charge cards. The Appendix B guidance consolidates and updates current Governmentwide charge card program requirements and guidance issued by the Office of Management and Budget, GSA, Department of the Treasury, and other Federal agencies. Appendix B provides a single document to incorporate changes, new guidance, or amendments to existing guidance, and establishes minimum requirements and suggested best practices for Government charge card programs that may be supplemented by individual agency policy procedures.