Mont. Code Ann. § 7-15-4266

A municipality may operate and maintain real property acquired in an urban renewal area pending the disposition of the property for redevelopment, without regard to the provisions of 7-15-4262 and 7-15-4264, for such uses and purposes as may be deemed desirable even though not in conformity with the urban renewal plan. The municipality may, after a public hearing, extend the time for a period not to exceed 3 years.