Mont. Code Ann. § 72-15-303

If the public administrator, upon the expiration or termination of the public administrator's office and within 60 days after that date, fails to qualify as general administrator of estates not yet closed, the public administrator shall, upon demand of the successor to the office or voluntarily if the former public administrator desires to be relieved from further performance of the trust, surrender to the successor all estates not closed and property belonging to the estates after filing and presenting to the court for approval a full and complete account pertaining to each estate not closed.