Mont. Code Ann. § 50-60-605

Individuals, firms, cooperatives, corporations, or municipalities selling electricity are power suppliers. Except for temporary connections that the department of labor and industry may authorize by rule for a period not exceeding 14 days without a preconnection inspection, power suppliers may not connect with or energize an electrical installation under this part unless the owner or a licensed electrical contractor has delivered to the power supplier an electrical permit covering the installation, issued by the department of labor and industry or a county, city, or town certified to enforce the electrical code pursuant to 50-60-302.