Versions of Alabama Code 37-18-3. Exercise of police powers; licenses and permits; propane regulations on LawServer 2024 Alabama Code 37-18-3. Exercise of police powers; licenses and permits; propane regulations 2022 Alabama Code 37-18-3. Exercise of police powers; licenses and permits; propane regulations 2021 Alabama Code 37-18-3. Exercise of police powers; licenses and permits; propane regulations