The Mayor shall be responsible for: (1) Planning, developing, and maintaining procedures to ensure that the boards receive administrative support, including staff and facilities, sufficient to enable them to perform their responsibilities; (2) Processing and providing licenses as required and approved by the boards; (3) Providing investigative and inspection services; (4) Holding hearings on cases pursuant to guidelines established in § 3-1205.19 when requested to do so by the board, and appointing hearing officers to enable the boards to hold hearings; (5) Furnishing expert services in noncompliance cases brought in an administrative or court proceeding; (6) Providing budgetary and personnel services; (7) Maintaining central files of records pertaining to licensure, inspections, investigations, and other matters requested by the boards; (8) Furnishing facilities and staff for hearings and other proceedings; (9) Providing information to the public concerning licensing requirements and procedures; (10) Publishing and distributing procedural manuals concerning licensing and inspections and other materials prepared by the boards; (11) Assisting, supplying, furnishing, and performing other administrative, clerical, and technical support the Mayor determines is necessary or appropriate; (12) Issuing rules, as the Mayor may periodically determine to be necessary to protect the health and welfare of the citizens of the District, for the temporary licensure for a fixed period of time not to exceed 90 days and under conditions to be prescribed by the Mayor by rule, of applicants for licensure to practice a health occupation in the District, except the Mayor may provide for the issuance of temporary licenses to applicants for licensure to practice social work and marriage and family therapy for a period not to exceed 1 year, and to applicants for licensure to practice as anesthesiologist assistants for a period not to exceed 2 years; (13) Making necessary rules relating to the administrative procedures of the boards; and (14) Issuing all rules necessary to implement the provisions of this chapter.