48 CFR § 951.103
Ordering from Government supply sources
November 17, 2020
(b) The Senior Procurement Executive shall be informed of instances in which GSA sources of supply are not used because of the quality of the items available from GSA or when a Federal Supply Schedule contractor refuses to honor an order.
[49 FR 12042, Mar. 28, 1984, as amended at 74 FR 36378, July 22, 2009]