Montana Title 7. Local Government § 7-1-4112. Exceptions from classification system

(1) every municipal corporation having a population of more than 9,000 and less than 10,000 may, by resolution adopted by the city council pursuant to 7-1-4114 through 7-1-4118, be either a first-class city or a second-class city;

(2) every municipal corporation having a population of more than 5,000 and less than 7,500 may, by resolution adopted by the city council pursuant to 7-1-4114 through 7-1-4118, be either a second-class city or a third-class city; and

(3) every municipal corporation having a population of more than 1,000 and less than 2,500 may, by resolution adopted by the city or town council pursuant to 7-1-4114 through 7-1-4118, be either a city or town.