No person shall remove a wheel, pole shaft, whiffletree, swinglebar or a part of a vehicle or harness likely to cause accident if the horse starts, without first unhitching the horse attached to the vehicle.
N.J. Stat. Ann. § 39:4-18
Removing part of vehicle or harness
Current official text: New Jersey Legislature. Digitized from the New Jersey Legislature bulk statutes download. Reproduced from public-domain New Jersey statutes; confirm against the official source for the current text. Not legal advice.