Ariz. Rev. Stat. § 9-537
In so far as the provisions of this article are inconsistent with any other provision of law, the provisions hereof shall be controlling. The powers conferred by this article shall be in addition and supplemental to the powers conferred by any other law. Except as expressly provided in this article, the utility undertaking may be constructed, improved, reconstructed, extended and acquired, notwithstanding any other law providing for the construction, improvement, reconstruction, extension or acquisition of a like utility undertaking and without regard to the requirements, restrictions or other provisions contained in any law, including, but not limited to, sections 9-511 to 9-514, inclusive. Bonds may be issued under this article for any utility undertaking, notwithstanding that any other law may provide for the issuance of bonds for a like purpose and without regard to the requirements, restrictions or provisions contained in any other law.
A.R.S. § 9-537