Ariz. Const. art. XXII, § 7

Whenever the judge of the superior court of any county, elected or appointed under the provisions of this Constitution, shall have qualified, the several causes then pending in the district court of the Territory, and in and for such county, except such causes as would have been within the exclusive jurisdiction of the United States courts, had such courts existed at the time of the commencement of such causes within such county, and the records, papers, and proceedings of said district court, and other property pertaining thereto, shall pass into the jurisdiction and possession of the superior court of such county.

It shall be the duty of the clerk of the district court having custody of such papers, records, and property, to transmit to the clerk of said superior court the original papers in all cases pending in such district and belonging to the jurisdiction of said superior court, together with a transcript, or transcripts, of so much of the record of said district court as shall relate to the same; and until the district courts of the Territory shall be superseded in manner aforesaid, and as in this Constitution provided, the said district courts, and the judges thereof, shall continue with the same jurisdiction and powers, to be exercised in the same judicial district, respectively, as heretofore, and now, constituted.