D.C. Mun. Regs. tit. 27, § 1623
1623.1 After the issuance of a solicitation, but before the date set for receipt of proposals, the contracting officer may make changes in the solicitation to reflect any of the following:
1623.2 The contracting officer shall determine if the closing date and time needs to be changed when amending a solicitation, and shall notify all prospective offerors of any change in the closing date necessitated by an amendment.
1623.3 The contracting officer shall not award a contract unless all amendments made to the RFP have been issued in sufficient time to be considered by prospective offerors.
SOURCE: Final Rulemaking published at 35 DCR 1461 (February 26, 1988); as amended by Final Rulemaking published at 60 DCR 1136 (February 1, 2013).