Mont. Code Ann. § 20-25-407
20-25-407 Prior obligations not affected
20-25-407 . Prior obligations not affected. No provision of this chapter shall affect or impair:
(1) any contract or undertaking or the financing or agreement to finance any contract or undertaking entered into under the provisions of the laws repealed hereby prior to January 18, 1971; and
(2) the issuance of bonds to finance facilities authorized or commenced under the laws repealed hereby prior to January 18, 1971.