Nonpermissible internal-combustion engines or other machinery which gives off noxious fumes may not be permitted underground in any coal mine.
Mont. Code Ann. § 50-73-303
Nonpermissible internal-combustion engines
Known as the Montana Coal Mining Code
The act spans §§ 50-73-101 to 50-73-418 (43 sections).
En. 50-567.1 by Sec. 17, Ch. 267, L. 1974; R.C.M. 1947, 50-467.1.
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.