Mont. Code § 18-2-122
This state and its political subdivisions such as counties, cities, towns, townships, boroughs, or other political entities or legally constituted boards, commissions, or authorities or officials or employees thereof may not accept plans and specifications for public buildings, water systems and storage facilities, sewerage systems, wastewater disposal projects, swimming pools, recreational facilities, and similar type projects which may have a direct bearing on the public health and safety for approval unless they bear the seal of the professional engineer for engineering projects or the professional land surveyor for land surveying projects or licensed architect for architectural projects, as provided for the practice of the respective professions by Title 37.
§ 18-2-122, MCA