Mont. Code § 35-16-405
Upon the signing, entering, and docketing of a judgment authorizing the loan, the executive officers of such corporation or district shall be authorized and empowered to make, execute, and provide for the sale and delivery of notes, bonds, coupons, or other evidences of indebtedness of said corporation or district and make, execute, and deliver mortgages and deeds of trust or instruments of hypothecation, as required, as security for such debts and the interest thereon. Any such mortgage or deed of trust which may be executed and delivered in accordance herewith shall set forth at length the order and decree of the district court authorizing the same, and when recorded in the office of the county clerk and recorder of any county in which membership lands included in the membership of such corporation or district or any of the assets of said corporation or district are situated, said mortgage shall be a first lien upon all the lands of said corporation or district and upon all of the membership lands of the individual members as may be included in said corporation or district situated in such county as of the date when such lands became members of such corporation or district, to the extent of the limitation of indebtedness thereon herein provided for.
§ 35-16-405, MCA