The police reserve officers may be assigned to perform the duties of the Police Department or may be assigned to do special duty at a fixed place at the expense of the person for whom the duty is performed. The funds so collected become part of the Police Reserve Fund which must be used and disbursed in accordance with the usual requirements for the receipt, custody, and disbursement of funds of the city by the City Manager and the Council, as the City Manager and Council determine from time to time.
('72 Code, § 270:20)