Ariz. Const. art. XII, § 7 – County charter provisions

A. Charter counties continue to be political subdivisions of this state that exist to aid in the administration of this state's laws and for purposes of self-government. Except as otherwise provided in this article the powers of the legislature over counties are not affected by this section and sections 5, 6, 8 and 9 of this article. Charter counties shall provide the same state mandated services and perform the same state mandated functions as non-charter counties. Charter counties may exercise, if provided by the charter, all powers over local concerns of the county consistent with, and subject to, the constitution and the laws of this state. In matters of strictly local municipal concern, charters adopted pursuant to article XIII shall control in any case of conflict with a county charter adopted pursuant to this article.
B. If a county has framed and adopted a charter and the charter is approved by the governor as provided in this article, the county shall be governed by the terms of its charter and ordinances passed pursuant to its charter. If the charter has been framed, adopted and approved and any of its provisions are in conflict with any county ordinance, rule or regulation relating to local concerns of the counties in force at the time of the adoption and approval of the charter, the provisions of the charter prevail notwithstanding the conflict and operate as a repeal or suspension of the law to the extent of conflict, and the law is not thereafter operative as to such conflict.
C. Notwithstanding article IX, section 1, if proposed and approved in the charter, a charter county may levy and collect:
1. 1. Taxes on a countywide basis to provide services on a countywide basis.
2. 2. Taxes on a specially designated area basis to provide services or special levels of service to that area.
  All taxes levied pursuant to this subsection shall be uniform upon the same class of property within the territorial limits of the county or the specially designated area and shall be levied and collected for public purposes only.
D. The decision to include a charter provision authorizing taxation pursuant to subsection C, paragraph 1 or 2 of this section shall be placed on the ballot as separate questions at the election to ratify the charter and must be approved by a majority of the qualified electors voting at the election. The result of the voting on either provision authorizing taxation does not affect the result of the voting to ratify the charter. Charter provisions authorizing taxation pursuant to subsection C, paragraph 1 or 2 of this section may also be proposed by an amendment to the charter pursuant to section 6 of this article.
E. If the authority to tax pursuant to subsection C, paragraph 2 of this section is approved for inclusion in the charter, any new tax proposed by the county under subsection C, paragraph 2 of this section shall be voted on by the qualified electors of the specially designated area. The tax must be ratified by a majority vote of the qualified electors voting at the election.
F. A transaction privilege tax, use tax or similar tax levied by a county pursuant to subsection C, paragraph 1 of this section:
1. 1. May be imposed on only those business activities, or on the use, storage or consumption, which are subject to the comparable state transaction privilege tax, use tax or similar tax.
2. 2. Shall provide all exclusion and exemptions provided by, and administrative provisions consistent with, the comparable state transaction privilege tax, use tax or similar tax.
G. All taxes levied under subsection F of this section shall not exceed an aggregate rate of two per cent when combined with existing taxes levied pursuant to title 42, chapter 8.3.
H. If approved in the charter, a charter county may adopt fees and fee schedules for any county products and county service delivery it provides in the conduct of any official business. Notwithstanding any fee schedules or individual charges provided by state law, the governing body of a charter county may adopt an alternate fee schedule or individual charge. Any fee or charge established pursuant to this section shall be attributable to and defray or cover the current or future costs of the product or service delivery for which the fee or charge is assessed.
I. Taxes raised under the authority of this section shall be subject to the provisions of the county property tax and expenditure limitations pursuant to article IX, sections 19 and 20.