Montana Title 7. Local Government § 7-34-2413. Limitations on bond authority

(1) no such bonds may be issued at any time if the total amount of principal and interest to become due in any year on such bonds and on any then-outstanding bonds for which revenues from the same source or sources are pledged exceeds the amount of such revenues to be received in that year as estimated in the resolution authorizing the issuance of the bonds; and

(2) the county shall be obligated to take all action necessary and possible to impose, maintain, and collect rates, charges, rentals, and taxes, if any are pledged, sufficient to make the revenues from the pledged source or sources in such year at least equal to the amount of such principal and interest due in that year.