Montana rules in plain terms
Montana requires electricians and electrical contractors to be licensed by the State Electrical Board (MCA Title 37, ch. 68). Look up any contractor or electrician by name or license number in the Montana DLI license lookup, and ask to see the license; electricians must carry it on the job. The board requires workers' comp and UI coverage (or an exemption), not a set liability amount, so ask for a certificate of liability insurance.
Bozeman, Belgrade and Manhattan issue electrical permits inside city limits; everywhere else in the valley, including Livingston, Three Forks, Big Sky and Four Corners, permits come from the Montana Department of Labor & Industry (DLI Building Codes). NorthWestern won't energize new or changed wiring without a permit.
Montana's homeowner exemption (MCA 37-68-103(3)) covers your own property maintained for your own use, done personally, with a permit and inspection; not rentals, tenants or grid-tied generators. Renters: report problems to the landlord in writing; landlords must use licensed contractors for rental work. Not legal advice.
Do not pay in full before the work is done.