(a) No person shall adjust or repair any motor vehicle or motorcycle or race the motor of the same while standing on the public streets of the City, except in case of a breakdown or other emergency requiring such repair.
(b) No employee connected with a garage or repair shop or other person shall use sidewalks or streets in the vicinity of such garage or shop for the purpose of working on motor vehicles or motorcycles of any kind.
(1958 Code § 16.23)