CFR › Title 48 › Part 51Part 51 — Use of Government Sources by Contractors§ 51.000— Scope of part.Subpart 51.1 — Contractor Use of Government Supply Sources§ 51.100— Scope of subpart.§ 51.101— Policy.§ 51.102— Authorization to use Government supply sources.§ 51.103— Ordering from Government supply sources.§ 51.104— Furnishing assistance to contractors.§ 51.105— Payment for shipments.§ 51.106— Title.§ 51.107— Contract clause.Subpart 51.2 — Contractor Use of Interagency Fleet Management System (IFMS)§ 51.200— Scope of subpart.§ 51.201— Policy.§ 51.202— Authorization.§ 51.203— Means of obtaining service.§ 51.204— Use of interagency fleet management system (IFMS) vehicles and related services.§ 51.205— Contract clause.