Ariz. Rev. Stat. § 48-905
B. Notice announcing the hearing and stating the boundaries of the proposed district or addition shall be published twice in a newspaper of general circulation in the county within which the proposed district or addition is located. The publications shall be one week apart, and the first publication shall be not less than ten days prior to the date of the hearing. The notice shall also be mailed by first class mail at least twenty days before the hearing to:
2. The corporation commission, if the petition requests the establishment of a district or an addition to an existing district for the purposes described in section 48-909, subsection A, paragraph 5 or 6 and the boundaries of the proposed district or addition are wholly or partially within either of the following: