§ 70.17  USE OF SLUGS; OVERTIME PARKING.
   It shall be unlawful for any person to deposit or cause to be deposited in any parking meter any slug, device or substitute for a proper coin of the United States, or to deposit or cause to be deposited in any parking meter additional proper coins of the United States for the purpose of increasing or extending the legal parking time which has been established by the Traffic Authority for the parking meter space adjacent to which the parking meter is placed.
(1967 Code, § 11-13)  Penalty, see § 70.99