Department of Defense FAR Supplement The Department of Defense policies and procedures implementing and supplementing the Federal Acquisition Regulation (FAR) are reproduced in this essential resource. The July 2020 Department of Defense FAR Supplement (DFARS) includes the full text of the DFARS and the DFARS companion resource Procedure Guidance Information (DFARS PGI). You gain at-your-fingertips access to DFARS regulations and related guidance, including all interim rules, final rules and change notices issued prior to July 1, 2020, along with an easy-to-use topical index. The gold-standard for Department of Defense regulations, DFARS requirements, federal procurement guidelines, government contract guidelines, and more, this is the one resource that gives you what you need to maintain DFARS compliance. The regulations and guidance contained in this reference apply to contracting with the Office of the Secretary of Defense, the Departments of the Army, Navy and Air Force, the Defense Logistics Agency, and other defense agencies.