It shall be unlawful to operate a motor vehicle, unless such motor vehicle is provided with a muffler that shall at all times be kept closed so that the exhaust is effectively muffled.
(Prior Code, § 7.01.14) (Ord. 231, passed - -; Ord. 299, passed - -; Ord. 469, passed - -; Ord. 731, passed - -) Penalty, see § 70.99