Ariz. Rev. Stat. § 41-1484
In any action or proceeding based on an alleged unlawful employment practice, no person shall be subject to liability or punishment for or on account of the commission by such person of an unlawful employment practice if he pleads and proves that the act or omission complained of was in good faith, in conformity with and in reasonable reliance on any interpretation or opinion of the division or the failure of such person to publish or file any information required by any provision of this article if he pleads and proves that he failed to publish or file such information in good faith, in conformity with and in reasonable reliance on any instructions of the division regarding the publishing or filing of such information. Either defense, if established, shall be a bar to the action or proceeding, notwithstanding that after such act or omission, such interpretation or opinion is modified or rescinded or is determined by judicial authority to be invalid or of no legal effect or after failing to publish or file pursuant to the instructions of the division such instructions are determined by judicial authority not to be in conformity with the requirements of this article.
A.R.S. § 41-1484