A.R.S. § 27-675

At the discretion of and upon prior written approval of the department, a lessee may surrender a portion of the lands covered by the lease at any time upon payment to the department of all amounts then due as to the lands surrendered, but no refund of any part of the cash consideration or rental paid shall be made to the lessee upon such surrender. The lessee may surrender all of the lands covered by the lease at any time upon payment to the department of all amounts then due as to the lands surrendered, but no refund of any part of the cash consideration or rental paid shall be made to the lessee upon such surrender.