48 C.F.R. § 217.7002
DoD policy is to exchange, rather than replace, eligible nonexcess property whenever exchange promotes economical and efficient program accomplishment. Exchange policy, authority, and applicability are governed by—
[56 FR 36345, July 31, 1991, as amended at 65 FR 39705, June 27, 2000; 77 FR 23631, Apr. 20, 2012; 82 FR 61480, Dec. 28, 2017]