(a) No person shall stand or park any truck or other vehicle used or equipped to be used for a commercial or industrial purpose upon a street or public way in any area zoned R-2, R-3 or R-4 under the comprehensive Zoning Code, at any time except for the minimum period required in the usual course of business or industry for making delivery of or loading merchandise for delivery.
(b) Whoever violates any provision of this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.