Leases executed by guardians of minors under order of court for a period extending beyond the minority of the minor will be approved unless it appears that such action would be prejudicial to the interests of the minor: Provided, That in the event the minor becomes of age within 1 year from the date of execution of lease the consent of the minor to the execution of the lease should be obtained and submitted with the lease for consideration.
25 C.F.R. § 213.12