If one makes a thing from materials belonging to another, the latter may claim the thing on reimbursing the value of the workmanship unless the value of the workmanship exceeds the value of the materials, in which case the thing belongs to the maker on reimbursing the value of the materials.
Mont. Code Ann. § 70-4-201
Use of materials belonging to another -- reimbursement
En
Official source: Montana Code Annotated (Montana Legislature). Reproduced from public-domain Montana statutes; confirm against the official source for the current text. Not legal advice.