Me. Rev. Stat. tit. 30-A, § 4315

Beginning in 2023, and every 5 years thereafter, the department shall classify the service center communities in the State, using the most recent data available, into no less than 4 categories based on a methodology established by rule. The department shall maintain a list of service center communities, by category, and the department and the Department of Economic and Community Development shall post the list on their respective publicly accessible websites.