Maine Revised Statutes Title 7. Agriculture and Animals § 3921. License necessary

A dog may not be kept within the limits of the State, unless the dog has been licensed by its owner or keeper in accordance with the laws of this State.

Any law enforcement agency within the State, counties or municipalities owning dogs for law enforcement purposes shall be required to license the dogs in the municipality in which they are domiciled, but shall be exempt from any license or recording fee, provided that all other licensing requirements are fulfilled.