Montana Title 37. Professions and Occupations § 37-45-102. Definitions

(a) in the pursuit of an independent business, offers to undertake, undertakes, or submits a bid to construct, alter, repair, add to, subtract from, improve, move, wreck, or demolish for another a building, highway, road, railroad, excavation, or other structure, project, development, or improvement attached to real estate, including the installation of carpeting or other floor covering, the erection of scaffolding or other structures or works, or the installation or repair of roofing or siding;  or

(b) in order to do work similar to that described in subsection (1)(a) on the construction contractor's property, employs members of more than one trade on a single job or under a single building permit, except as otherwise provided.