(a) If a D&F; is superseded by another D&F;, that action shall not render invalid any action taken under the original D&F; prior to the date of its supersession.
(b) The contracting officer need not cancel the solicitation if the D&F;, as modified, supports the contract action. [50 FR 1726, Jan. 11, 1985, and 50 FR 52429, Dec. 23, 1985, as amended at 67 FR 13053, Mar. 20, 2002]