Montana Constitution Article X § 2

Section 2. Public school fund. The public school fund of the state shall consist of:

Corporation: A legal entity owned by the holders of shares of stock that have been issued, and that can own, receive, and transfer property, and carry on business in its own name.
Escheat: Reversion of real or personal property to the state when 1) a person dies without leaving a will and has no heirs, or 2) when the property (such as a bank account) has been inactive for a certain period of time. ^{Source: OCC}

(1) Proceeds from the school lands which have been or may hereafter be granted by the United States,

(2) Lands granted in lieu thereof,

(3) Lands given or granted by any person or corporation under any law or grant of the United States,

(4) All other grants of land or money made from the United States for general educational purposes or without special purpose,

(5) All interests in estates that escheat to the state,

(6) All unclaimed shares and dividends of any corporation incorporated in the state,

(7) All other grants, gifts, devises or bequests made to the state for general educational purposes.