[Code of Federal Regulations] [Title 48, Volume 1] [Revised as of October 1, 2005] From the U.S. Government Printing Office via GPO Access [CITE: 48CFR51] [Page 974] TITLE 48--FEDERAL ACQUISITION REGULATIONS SYSTEM CHAPTER 1--FEDERAL ACQUISITION REGULATION PART 51_USE OF GOVERNMENT SOURCES BY CONTRACTORS--Table of Contents Subpart 51.1_Contractor Use of Government Supply Sources 51.105 Payment for shipments. GSA, DOD, and VA will not forward bills to contractors for supplies ordered from Government stock until after the supplies have been shipped. Receipt of billing is sufficient evidence to establish contractor liability and to provide a basis for payment. Contracting officers should direct their contractors to make payment promptly upon receipt of billings.