Mont. Code Ann. § 72-5-437

The protected person, the protected person's personal representative, the conservator, or any other interested person may petition the court to terminate the conservatorship. A protected person seeking termination is entitled to the same rights and procedures as in an original proceeding for a protective order. The court, upon determining after notice and hearing that the minority or disability of the protected person has ceased, may terminate the conservatorship. Upon termination, title to assets of the estate passes to the former protected person or to the former protected person's successors, subject to provision in the order for expenses of administration or to conveyances from the conservator to the former protected person or the former protected person's successors to evidence the transfer.