[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 51.107 Contract clause. The contracting officer shall insert the clause at 52.251-1, Government Supply Sources, in solicitations and contracts when the contracting officer may authorize the contractor to acquire supplies or services from a Government supply source. If a facilities contract is contemplated, the contracting officer shall use the clause with its Alternate I.