The city or town council shall have the power, not more than once in a year, to change by resolution the boundaries and number of any maintenance district, but such change of boundaries shall not affect indebtedness existing at the time of such change.
Change Of Boundaries Of Maintenance District
Mont. Code Ann. § 7-12-4335, under Special Provisions for Special Improvement Lighting Districts.
Mont. Code Ann. § 7-12-4335