Ga. Code § 35-1-11
An elected sheriff or police chief of a local law enforcement agency or fire chief of a local fire department, with the approval of the local governing authority, shall be authorized to designate, equip, and train nonsworn law enforcement employees and firefighters and volunteers to assist in traffic control, provided that such individuals have successfully completed at least one hour of a traffic control training program approved by the Georgia Peace Officer Standards and Training Council. With the approval of the sheriff or police chief of a local law enforcement agency or fire chief of a local fire department, such individuals shall be authorized to direct and regulate the flow of traffic. Any such individual who is not certified pursuant to the requirements of Chapter 8 of this title shall not have the power of arrest provided to peace officers.
OCGA § 35-1-11