D.C. Mun. Regs. tit. 30, § 2513
2513.1 If a purchase order that has been accepted in writing by the contractor is to be terminated, the contracting officer shall process the termination action in accordance with the termination provisions of Chapter 37 of Title 27, Contracts and Procurements (hereafter, "Title 27 DCMR").
2513.2 If a purchase order that has not been accepted in writing by the contractor is to be cancelled, the contracting officer shall notify the contractor in writing that the purchase order has been cancelled, request the contractor's written acceptance of the cancellation, and proceed in accordance with the provisions of §§ 2513.3 and 2513.4.
2513.3 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 shall be required and the purchase order shall be considered cancelled.
2513.4 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 treat the action as a termination in accordance with the provisions of Chapter 37 of the Title 27 DCMR.
SOURCE: Final Rulemaking published at 36 DCR 6681, 6778 (September 22, 1989)