Military activities shall utilize the buying services of GSA when:
(a) GSA has agreed with the Secretary of Defense, or with the Secretary of a military department in connection with the requirements of that department, to perform such buying services; and
(b) The items involved are not properly obtainable from GSA stock or Federal Supply Schedules.
[29 FR 15610, Nov. 20, 1964, as amended at 36 FR 17423, Aug. 31, 1971]