48 C.F.R. § 51.103
(a) Contractors placing orders under Federal Supply Schedules shall follow the terms of the applicable schedule and authorization and include with each order—
(2) The following statement:
This order is placed under written authorization from ______________________ dated____________. In the event of any inconsistency between the terms and conditions of this order and those of your Federal Supply Schedule contract, the latter will govern.
(b) Contractors placing orders for Government stock shall—
[48 FR 42476, Sept. 19, 1983, as amended at 54 FR 29282, July 11, 1989; 55 FR 52797, Dec. 21, 1990; 56 FR 55372, Oct. 25, 1991; 61 FR 41471, Aug. 8, 1996; 62 FR 44819, Aug. 22, 1997; 67 FR 43516, June 27, 2002]