Ariz. Rev. Stat. § 14-10819
A. Unless the terms of the trust instrument expressly provide otherwise, a trustee who has the discretion under the terms of a testamentary instrument or irrevocable inter vivos agreement to make distributions, regardless of whether a standard is provided in the trust instrument to or for the benefit of a beneficiary of the trust, may exercise without prior court approval the trustee's discretion by appointing part or all of the trust property in favor of a trustee of another trust if the exercise of this discretion: