A.R.S. § 12-1834: Personal representatives, etc.; declaration of rights

Any person interested as or through a personal representative, administrator, trustee, guardian, conservator or other fiduciary, creditor, devisee, heir, next of kin, or cestui que trust, in the administration of a trust, or of the estate of a decedent, an infant, ward, or insolvent, may have a declaration of rights or legal relations in respect to any of the following:

1. To ascertain any class of creditors, devisees, heirs or others; or

2. To direct the personal representatives, administrators, trustees, guardians or conservators to do or abstain from doing any particular act in their fiduciary capacity; or

3. To determine any question arising in the administration of the estate or trust, including questions of construction of wills and other writings.