Ariz. Rev. Stat. § 43-1504
A. A school tuition organization that receives contributions from a corporation for the purposes of section 20-224.06 or 43-1183 must use at least ninety percent of those contributions to provide educational scholarships or tuition grants only to children whose family income does not exceed one hundred eighty-five percent of the income limit required to qualify a child for reduced-price lunches under the national school lunch and child nutrition acts (42 United States Code sections 1751 through 1793) and to whom any of the following applies:
7. Subject to subsection G of this section, are placed in foster care pursuant to title 8, chapter 4 at any time before the student graduates from high school or obtains a general equivalency diploma and who meet all of the following criteria: