DFARS 209.270-3

Policy.

(a) The head of the contracting activity responsible for procuring an aviation or ship critical safety item may enter into a contract for the procurement, modification, repair, or overhaul of such an item only with a source approved by the head of the design control activity. (b) The approval authorities specified in this section apply instead of those otherwise specified in FAR 9.202(a)(1), 9.202(c), or 9.206-1(c), for the procurement, modification, repair, and overhaul of aviation or ship critical safety items.

Source: acquisition.gov — DFARS

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