Mont. Code Ann. § 7-3-4374

All public advertising or publication mentioned as being necessary under the provisions of this part or part 44 shall be in a daily newspaper of general circulation within the municipality if there be such; otherwise, in a weekly newspaper published therein, and shall be done by contract, or in a journal published by the municipality, as may be determined by ordinance. If such contract shall be with a newspaper, it shall be entered into only after opportunity has been given for competition under such rules as the commission may establish and for a term not longer than 1 year.