D.C. Code § 9-111.01
Section 629 of D.C. Law 18-370 provided: "Sec. 629. Applicability. This subtitle shall apply as of October 1, 2011; except, that sections 622 and 623(a)(2) shall apply as of the effective date of this act."
Mayor authorized to issue rules: Section 103 of D.C. Law 11-184 provided that the Mayor may issue rules and regulations as the Mayor finds necessary to carry out the purposes of title I of the act pursuant to subchapter I of Chapter 5 of Title 2.