Ala. Code § 37-1-31: Exclusive Powers and Jurisdiction.

The rights, powers, authority, jurisdiction and duties by this title conferred upon the commission shall be exclusive and, in respect of rates and service regulations and equipment, shall be exercised notwithstanding any rights heretofore acquired by the public under any franchise, contract or agreement between any utility and municipality, county or municipal subdivision of the state, and shall be exercised, so far as they may be exercised consistently with the Constitution of the state and of the United States, notwithstanding any right heretofore so acquired by any such utility.