Ariz. Rev. Stat. § 15-828
A. On enrollment of a pupil for the first time in a particular school district or private school offering instruction to pupils in any kindergarten programs or grades one through twelve, that school or school district shall notify the person enrolling the pupil in writing that within thirty days the person must provide one of the following:
B. If a child is instructed at home pursuant to section 15-802, the person who has custody of the child shall, within thirty days after the home instruction begins, provide to the county school superintendent of the county in which the child resides one of the following: