No ordinance other than an emergency ordinance shall be effective until 30 days after second and final adoption. The ordinance may provide for a delayed effective date or may provide for the ordinance to become effective upon the fulfillment of an indicated contingency.
Effective Date Of Ordinance
Mont. Code Ann. § 7-5-105, under Local Government Ordinances, Resolutions, and Initiatives and Referendums.
Mont. Code Ann. § 7-5-105