D.C. Code § 6-1112
Because of the codification of D.C. Law 5-69 as subchapter II of this chapter, and the designation of the preexisting text of Chapter 11 as subchapter I, "subchapter" has been substituted for "chapter," where applicable, in this section.
Section 20(c) of D.C. Law 13-313, amends D.C. Law 13-172 by adding a new section 403a which provided:
"Sec. 403a. Applicability. Section 403(a) and (b)(1)(A) and (B) shall app only prospectively to hearings held by the Mayor or the Historic Preservation Board after the effective date of this title."