Any person may commence a civil action in a court of competent jurisdiction on his or her own behalf for injunctive relief, to enforce a requirement, or to order the Mayor to perform a non-discretionary act against any person (including the District government to the extent permitted by the Eleventh Amendment of the U.S. Constitution) who is alleged to be the following:
No action shall be taken under the provisions of this section prior to ten (10) days after the plaintiff has given notice of the violation to the Mayor, and to any alleged violator of the requirements.
No action shall be taken under the provisions of this section if the Mayor has commenced and is diligently prosecuting a civil action in a court of competent jurisdiction in the District of Columbia to require compliance with the Act.
D.C. Mun. Regs. tit. 20, r. 20-2714