D.C. Mun. Regs. tit. 8-B, § 3216
3216.1 Each amendment to an IFB shall be identified as an IFB amendment. The contracting officer shall require each bidder to acknowledge receipt of all IFB amendments issued.
3216.2 If it becomes necessary to make changes in quantity, specifications, delivery schedules, opening dates, or other terms of an IFB, or to correct a defective or ambiguous IFB, the change shall be accomplished by a written amendment to the IFB.
3216.3 Each amendment shall specifically reference the section or provision of the IFB amended.
3216.4 The contracting officer shall send each IFB amendment to all prospective bidders to which an IFB has been furnished.
3216.5 The contracting officer shall distribute each amendment within a reasonable time to allow all prospective bidders to consider the information before submitting or modifying their bids.
3216.6 If, due to the issuance of an IFB amendment, the time and date for receipt of bids set in the original IFB would not permit preparation of the bid, the contracting officer may increase the time for submission of the bids. Notice shall be given to prospective bidders in the amendment, to the extent possible, or, if necessary, by telegram, facsimile, or telephone and confirmed in the amendment.
SOURCE: Final Rulemaking published at 39 DCR 2566 (April 10, 1992).