Federal Acquisition Regulations (FAR) is the principal set of rules in the Federal Acquisition Regulation System.   This system is used by U.S. federal government agencies to govern and regulate the "acquisition process", the process through which the government purchases ("acquires") goods and services. There are three phases of an acquisition by a federal agency: (1) need recognition and acquisition planning, (2) contract formation, and (3) contract administration.   FAR does not regulate the purchasing activities of private sector firms, unless and except to the extent parts of it are incorporated into government solicitations and contracts by reference.


 FAR (Website)