(7) "Law enforcement unit" means:
(A) Any agency, organ, or department of this state, a subdivision or municipality thereof, or a railroad whose primary functions include the enforcement of criminal or traffic laws, the preservation of public order, the protection of life and property, or the prevention, detection, or investigation of crime;
(B) The Office of Permits and Enforcement of the Department of Transportation, the Department of Juvenile Justice and its institutions and facilities for the purpose of personnel who are authorized to exercise the power of arrest and who are employed or appointed by said department or institutions, and the office or section in the Department of Juvenile Justice in which persons are assigned who have been designated by the commissioner to investigate and apprehend unruly and delinquent children; and
(C) The Department of Corrections, the State Board of Pardons and Paroles, municipal correctional institutions employing 300 or more correctional officers, and county correctional institutions for the purpose of personnel who are authorized to exercise the power of arrest and who are employed or appointed by said department, board, or institutions.
http://www.gapost.org/postAct/3582.html