Ariz. Rev. Stat. § 14-9116
A. Except as provided in subsection C, unless previously barred by adjudication, consent or limitation, a claim for relief against a custodial trustee for accounting or breach of duty is barred as to a beneficiary, a person to whom custodial trust property is to be paid or delivered or the legal representative of an incapacitated or deceased beneficiary or payee who either:
C. A claim for relief is not barred by this section if the claimant either:
2. Is an incapacitated adult, until the earliest of two years after: