Mont. Code Ann. § 75-10-111

The department shall adopt the solid waste management and resource recovery plan required in 75-10-104 and 75-10-807 according to the rulemaking procedures of the Montana Administrative Procedure Act under Title 2, chapter 4, part 3. The department shall prepare the plan in conjunction with local governments in the state, citizens, solid waste and recycling industries, environmental organizations, and others involved or interested in the management of solid waste. Within 3 days after the notice of proposed rulemaking to adopt the plan is published pursuant to Title 2, chapter 4, part 3, the department shall mail a copy of the notice and the proposed plan to the board of county commissioners in each county in the state, the governing body of every incorporated city or town in the state, any person responsible for the operation of a solid waste management system under the provisions of Title 75, chapter 10, parts 1 and 2, the governor, the environmental quality council in accordance with 5-11-210, and any other interested person. During the period for receipt of comments on the proposed rulemaking concerning the plan, the department shall hold at least one public hearing.