D.C. Mun. Regs. tit. 27, § 1110
1110.1 In order to qualify as a District-based business, a business enterprise, including a sole proprietorship, shall be required to satisfy all of the following criteria:
1110.2 When using the competitive sealed proposal method of procurement, the contracting officer may increase the offeror's evaluation point score by not more than five percent (5%) of the total possible number of evaluation points for a proposal submitted by a District-based business. The number of preference points shall be stated in the solicitation.
1110.3 When a solicitation is in the sheltered market, the contracting officer may accord a preference to a minority business enterprise having a principal office located in the District according to §605 of this title.
SOURCE: Final Rulemaking published at 35 DCR 1400 (February 26, 1988).