The powers conferred by sections 40-33-17 through 40-33-21 shall be in addition and supplemental to, and not in substitution for, and the limitations imposed by sections 40-33-17 through 40-33-21 shall not affect the powers conferred by any other law, and no other law shall be deemed repealed hereby. So far as the provisions of sections 40-33-17 through 40-33-21 are inconsistent with any other laws of this state, the provisions of sections 40-33-17 through 40-33-21 shall be controlling with reference to the making of contracts and the issuance of revenue bonds or certificates of the types and for the purposes herein mentioned.