The provisions of this article shall not apply to volunteer rescue squads that are members of the Alabama Association of Rescue Squads, Inc., and which furnish BLS ambulance service to the public; nor shall the provisions of this chapter apply to businesses or companies which only provide free ambulance service to their employees who require medical attention on business or company grounds; nor shall the provisions of this chapter apply to or govern ambulances owned by a county, a municipality, or any other political subdivision of the state.