Every trailer, semitrailer, and pole trailer equipped with air or vacuum actuated brakes and every trailer, semitrailer, and pole trailer with a gross weight in excess of 3,000 pounds, manufactured or assembled after January 1, 1966, shall be equipped with brakes acting on all wheels and of such character as to be applied automatically and promptly, and remain applied for at least 15 minutes upon breakaway from the towing vehicle.
Mont. Code Ann. § 61-9-305
Automatic trailer brake application upon breakaway
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.