Air brake systems installed on trailers manufactured or assembled after January 1, 1966, shall be so designed that the supply reservoir used to provide air for the brakes shall be safeguarded against backflow of air from the reservoir through the supply line.
Mont. Code Ann. § 61-9-307
Trailer air reservoirs safeguarded
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.