48 CFR 13.302-4: 13.302-4 Termination or cancellation of purchase orders.

(a) If a purchase order that has been accepted in writing by the contractor is to be terminated, the contracting officer shall process the termination in accordance with—

(1) 12.403 and 52.212-4(l) or (m) for commercial products and commercial services; or

(2) Part 49 or 52.213-4 for other than commercial products and commercial services.

(b) If a purchase order that has not been accepted in writing by the contractor is to be canceled, the contracting officer shall notify the contractor in writing that the purchase order has been canceled, request the contractor's written acceptance of the cancellation, and proceed as follows:

(1) If the contractor accepts the cancellation and does not claim that costs were incurred as a result of beginning performance under the purchase order, no further action is required (i.e., the purchase order shall be considered canceled).

(2) If the contractor does not accept the cancellation or claims that costs were incurred as a result of beginning performance under the purchase order, the contracting officer shall process the action as a termination prescribed in paragraph (a) of this subsection.