1. Upon recommendation of the chief of police, the board may authorize and provide for the organization of a police reserve force composed of residents of the city who qualify under the provisions of subsection 1 of section 84.570. Such reserve force shall be under the command of the chief of police and shall be provided training, equipment, uniforms, and arms as the chief shall direct with the approval of the board; and when assigned to active duty the members of the reserve force shall possess all of the powers of regular police officers and shall be subject to all laws and regulations applicable to police officers; provided, however, that the city council or other governing body of any such city may in its discretion fix a total in number which the reserve force may not exceed.

2. In event of riot or other emergencies as declared and defined by the mayor, the city council or other governing body in such city in concurrence with the board, the board, upon recommendation of the chief, may appoint special officers or patrolmen for temporary service in addition to the police reserve force herein provided for, but the length of time for which such officers or patrolmen shall be employed shall be limited to the time during which such emergency shall exist.