A.R.S. § 22-304

When a change of the place of trial is ordered, the justice of the peace shall transmit to the justice of the peace before whom the trial is to be had all original papers in the proceeding or action, with a certified copy of the minutes of his proceedings. Upon receipt thereof, the justice of the peace to whom they are delivered shall proceed with the trial as if the proceeding or action had been originally commenced in his court.