Montana Title 7. Local Government § 7-3-1223. Effective date of ordinances

(1) Ordinances making the annual tax levy, ordinances and resolutions providing for local improvements and assessments, and emergency measures shall take effect at the time indicated therein. All other ordinances and resolutions enacted by the commission shall be in effect from and after 30 days from the date of their passage.

(2) When an ordinance proposed by initiative petition is passed by the commission in a changed or amended form and the committee of the petitioners requires that such proposed ordinance be submitted to a vote of the electors, as provided in 7-3-1229, the ordinance as passed by the commission shall not take effect until after such vote, and if the proposed ordinance so submitted be approved by a majority of the electors voting thereon, the ordinance as passed by the commission shall be deemed repealed.

(3) Ordinances adopted by the electors shall take effect at the time fixed therein or, if no time is specified, 30 days after the adoption thereof.