Mont. Code Ann. § 7-14-4623

The legislative body of a city, at any time after the activation of a parking commission, may adopt by a two-thirds vote thereof a resolution transferring the property of the commission to the city. The city may, through such department as it may determine, exercise its powers in regard thereto by virtue of the constitution or this or other general law, but no such transfer shall be made in contravention of any covenant or agreement made with the holders of any revenue bonds of the commission theretofore issued and then outstanding.