48-2908. Proof of publication of notice of hearing; veracity of signatures on petition Proof that the petition was signed by the persons whose names appear thereon and proof that notice of hearing was given by publication and posting may be made by the affidavit or affidavits of persons having knowledge of the facts, and filed with the board. When the affidavits are made and filed they shall be prima facie evidence that the petitioners are entitled to the hearing prayed for in the petition and of the truth of all matters set forth in the petition.
Arizona Legal Code