law: 82. Exposing animal for hire, sale, etc.-
  No person shall in any street or public place expose for hire or sale any animal or vehicle, clean any furniture or vehicle, or clean or groom any horse or other animal except at such times and places as the competent authority permits, or shall train or break in any horse or other animal or make any vehicle or any part of a vehicle or (except when as a result of any accident repairing on the spot is unavoidable) repair any vehicle or part of a vehicle, or carry on therein any manufacture or operation so as to be a serious impediment to traffic or serious annoyance to residents in the vicinity or to the public.