Agencies shall ensure that-

(a) Contracts include inspection and other quality requirements, including warranty clauses when appropriate, that are determined necessary to protect the Government’s interest;

(b) Supplies or services (including commercial services) tendered by contractors meet contract requirements;

(c) Government contract quality assurance is conducted before acceptance (except as otherwise provided in this part), by or under the direction of Government personnel;

(d) No contract precludes the Government from performing inspection;

(e) Nonconforming supplies or services are rejected, except as otherwise provided in 46.407;

(f) Contracts for commercial products rely on a contractor’s existing quality assurance system as a substitute for compliance with Government inspection and testing before tender for acceptance unless customary market practices for the commercial product being acquired permit in-process inspection ( 41 U.S.C. 3307). Any in-process inspection by the Government shall be conducted in a manner consistent with commercial practice; and

(g) The quality assurance and acceptance services of other agencies are used when this will be effective, economical, or otherwise in the Government’s interest (see 42.002 and subpart  42.2.