48 CFR 46.402: 46.402 Government contract quality assurance at source.

Agencies shall perform contract quality assurance, including inspection, at source if—

(a) Performance at any other place would require uneconomical disassembly or destructive testing;

(b) Considerable loss would result from the manufacture and shipment of unacceptable supplies, or from the delay in making necessary corrections;

(c) Special required instruments, gauges, or facilities are available only at source;

(d) Performance at any other place would destroy or require the replacement of costly special packing and packaging;

(e) Government inspection during contract performance is essential; or

(f) It is determined for other reasons to be in the Government's interest.