Ariz. Rev. Stat. § 3-3493
A. All gasoline produced and shipped to or within this state and sold or offered for sale for use in motor vehicles in a county with a population of one million two hundred thousand or more persons and any portion of a county contained in area A, subject to an appropriate waiver granted by the administrator of the United States environmental protection agency pursuant to section 211(c)(4) of the clean air act as defined in section 49-401.01, shall comply with either of the following fuel reformulation options:
D. The petition shall:
H. The director of environmental quality in consultation with the associate director of the division shall adopt by rule:
(L16, Ch. 232, sec. 27)