If you're an contractor that works with an agency of U.S. Government you've almost definitely dealt with the FAR, which is also known as Federal Acquisition Regulation. This dense legal document governs the rules, rules, and regulations that government agencies and prime contractors must follow when working with each other. https://felixeiijh.p2blogs.com/18640454/documenting-negotiations-in-accordance-with-far-15-406-3