(1) Whenever practicable, the contracting officer should provide advance notice of a proposed change order to the administrative contracting officer (ACO).

(i) The ACO shall review the proposed change order to ensure compatibility with the status of performance.

(ii) If the contractor has progressed beyond the effective point specified in the proposed change order, the ACO shall determine the earliest practical point at which the change order could be made effective and shall advise the contracting officer.

(2) If a change order has been issued and the effective date has been determined to be impracticable, the contracting officer shall—

(i) Issue another change order to correct, revise, or supersede the first change order; then

(ii) Definitize by supplemental agreement citing both change orders.