Part 251 - USE OF GOVERNMENT SOURCES BY CONTRACTORS       Subpart 251.1 - CONTRACTOR USE OF GOVERNMENT SUPPLY SOURCES                                                         251.101 Policy.                                                            251.102 Authorization to use Government supply sources.                                                            251.107 Contract clause.                                                                             Subpart 251.2 - CONTRACTOR USE OF INTERAGENCY FLEET MANAGEMENT SYSTEM (IFMS)                                                         251.202 Authorization.                                                            251.205 Contract clause.    **Parent topic:** Defense Federal Acquisition RegulationSubpart 251.1 - CONTRACTOR USE OF GOVERNMENT SUPPLY SOURCES    251.101 Policy.       (a)(1) Notwithstanding the restriction at FAR 51.101(a)(1), contracting officers may authorize contractors to use Defense Logistics Agency Energy as a source of fuel in performance of other than cost-reimbursement contracts, when the fuel is funded by the Defense Working Capital Fund. When providing this authorization to contractors, follow the procedures at PGI PGI 251.101 Policy..251.102 Authorization to use Government supply sources.       (e)  When authorizing contractor use of Government supply sources, follow the procedures at PGI                 251.102             .          (3)(ii)  The contracting officer may also authorize the contractor to use the DD Form 1155 when requisitioning from the Department of Veterans Affairs.          (f)  The authorizing agency is also responsible for promptly considering requests of the DoD supply source for authority to refuse to honor requisitions from a contractor that is indebted to DoD and has failed to pay proper invoices in a timely manner.251.107 Contract clause.       Use the clause at                 252.251-7000             , Ordering From Government Supply Sources, in solicitations and contracts which include the clause at FAR 52.251-1, Government Supply Sources.          See DoD Class Deviation 2013-O0012, Authorization for Contractors to Use Government Supply Sources in Support of Operation Enduring Freedom, issued on April 24, 2013. This deviation encourages contracting officers to authorize contractors (including contractors with fixed-price contracts) to use appropriate Government supply sources, including DLA (for construction materials) and GSA Central Asia and South Caucasus Supply Catalog under the GSA Global Supply Program, in performance of contracts in support of Operation Enduring Freedom. This constitutes a deviation from the policy at FAR 51.101. This class deviation remains in effect until incorporated in the DFARS or otherwise rescinded.Subpart 251.2 - CONTRACTOR USE OF INTERAGENCY FLEET MANAGEMENT SYSTEM (IFMS)    251.202 Authorization.       (a)(2)(A) See FAR 28.307-2(c) for policy on contractor insurance.          (B) See FAR 28.308 for policy on self-insurance.          (C) See FAR 31.205-19 for allowability of insurance costs.          (5) Paragraph (d) of the clause at 252.251-7001 satisfies the requirement of FAR 51.202(a)(5) for a written statement.251.205 Contract clause.       Use the clause at                 252.251-7001             , Use of Interagency Fleet Management System (IFMS) Vehicles and Related Services, in solicitations and contracts which include the clause at FAR 52.251-2, Interagency Fleet Management System (IFMS) Vehicles and Related Services.