(a) All emergency vehicles shall be designated as such by the commissioner of motor vehicle safety. The commissioner shall so designate each vehicle by issuing to such vehicle a permit to operate flashing or revolving emergency lights of the appropriate color. Such permit shall be valid for one year from the date of issuance; provided, however, that permits for vehicles belonging to federal, state, county, or municipal governmental agencies shall be valid for five years from the date of issuance. Any and all officially marked law enforcement vehicles as specified in Code Section 40-8-91 shall not be required to have a permit for the use of a blue light. Any and all fire department vehicles which are distinctly marked on each side shall not be required to have a permit for the use of a red light.

(b) The commissioner shall authorize the use of red or amber flashing or revolving lights only when the person or governmental agency shall demonstrate to the commissioner a proven need for equipping a vehicle with emergency lights. The fee for such lights shall be $2.00, provided that no federal, state, county, or municipal governmental agency shall be required to pay such fee.

(c) Nothing contained in this Code section shall prohibit the commissioner from issuing a single special use permit to cover more than one vehicle, provided each vehicle covered under such special use permit shall pay the fee specified in subsection (b) of this Code section.

(d) Except as provided in this subsection, it shall be unlawful for any person, firm, or corporation to operate any motor vehicle or to park any motor vehicle on public property with flashing or revolving green lights. This subsection shall not apply to any motor vehicle being used by any law enforcement agency, fire department, emergency management agency, or other governmental entity to designate the location of the command post for such agency, department, or entity at the site of an emergency.