Ariz. Rev. Stat. § 45-1041
A. A person who seeks to give surface water, other than Colorado river water, in a water exchange to which neither section 45-1002, subsection A, paragraph 1 nor 3 applies shall apply to the director for a water exchange permit. The director shall issue either a specific use water exchange permit or a general use water exchange permit, as applicable, if the applicant demonstrates that all of the following apply:
6. Each party to a water exchange contract either:
B. Subsection A of this section does not apply to the proposed modification of a previously enrolled or permitted water exchange contract that involves surface water other than Colorado river water, if the proposed modification meets both of the following conditions:
1. The proposed modification involves the addition of one or more of the following water sources as the only new or additional water source of exchange: