Arizona Revised Statutes Title 9. Cities and Towns § 9-231. Common council

A. The corporate powers of a town incorporated under § 9-101 shall be vested in a common council. The first common council shall be appointed by the board of supervisors, on declaring the town incorporated, and the members shall continue in office until their successors are elected and qualified. The successors shall be elected by qualified electors residing in the town at an election held for that purpose on the third Tuesday in May following, and on the third Tuesday in May each two years thereafter, pursuant to § 16-204.

B. The common council of every town shall consist of five members if the population is fifteen hundred persons or less, or seven members if the population exceeds fifteen hundred persons at the time of incorporation. If thereafter the population of the town exceeds fifteen hundred persons as determined by the latest official United States census, the council may pass an ordinance increasing the membership to seven, with the additional two members to be elected at the first election subsequent to the passage of the ordinance.