Sec. 508. Appointment and Removal of Chief Administrative Officers. (a) Applicability. Subsections (a) through (e) of this section shall apply to all chief administrative officers, except the Chief of Police, the Executive Officer of the City Ethics Commission, the Executive Director of the Employee Relations Board, the general managers of the Fire and Police Pensions and the Los Angeles City Employees Retirement System, and the general managers of the Proprietary Departments. The following shall also be considered chief administrative officers for the purposes of this section: the Treasurer; the Executive Director of any City commission or agency created by ordinance that performs regulatory functions; and the executive director of all other ordinance created commissions or agencies unless the ordinance creating the commission or agency provides otherwise. The provisions of this section shall not apply to the Chief Legislative Analyst. (b) Appointment. Each chief administrative officer to whom this section applies shall be appointed by the Mayor, subject to confirmation by the Council. If the Council does not disapprove the appointment within 45 days after its submission to the Council, the appointment shall be deemed approved. The Mayor may, but shall not be required to, use the assistance of the Personnel Department in the recruitment and selection of candidates for appointment. No chief administrative officer appointed under this section shall acquire any property interest in employment in that position. (c) Temporary Appointments. The Mayor must fill any vacancy in the position of chief administrative officer within ten days of the vacancy. The Mayor may appoint a temporary chief administrative officer for six months, which period may be extended with the consent of Council for an additional six months. If no permanent appointment has been submitted to the Council during the initial or extended period, the temporary appointment shall be deemed submitted as a permanent appointment, and the time period for Council approval or disapproval shall commence as of that date. (d) Annual Review. The Mayor shall evaluate each chief administrative officer annually.