Ala. Code § 37-1-7: Impeachment and Removal of Commissioners.

The commissioners may be impeached and removed from office by the supreme court for the same causes and in the same manner as other state officers; and any commissioner who shall accept directly or indirectly any gift, gratuity, emolument or employment from any person, firm, corporation, company or association, owning or operating in whole or in part in this state a utility, as defined in this title, during his continuance in office, except a pass for himself or any employee of the commission on official business, shall forfeit his office and may be impeached and removed from office therefor, or for any other cause of impeachment.