Mont. Code Ann. § 72-14-210

Money and property placed in the private purpose trust fund must be held in trust for a period of 5 years prior to deposit in the public school permanent fund by the state treasurer. The private purpose trust is for the benefit of persons who claim property pursuant to part 3 of this chapter. A claim may be brought for an amount equal to the full amount or value of the property escheated minus the costs and expenses incident to reducing the property to the possession of the state.