D.C. Mun. Regs. tit. 27, § 2607
2607.1 Except as provided in §2607.2, a contracting officer shall not award a contract for the construction of a project to the firm that designed the project or its subsidiaries or affiliates without the prior written approval of the Director.
2607.2 If a proposed construction contract will use a design build or turnkey method of construction, the contracting officer may award the construction contract to an affiliate of the architect-engineer firm that designed the project without prior approval by the Director.
SOURCE: Final Rulemaking published at 35 DCR 1582 (February 26, 1988).