I don't know about other areas, but money had not been collected for parking tickets several years before we left.
***km 4/04 p. 7 Announcements ***
DISTRICT CONVENTION PARKING: At all convention sites where we have secured control of the parking facilities, the spaces will be made available at no charge on a first-come, first-served basis. No parking tickets will be used, but convention badge cards will serve as identification for parking.
(No one pays for the convention badges. I wonder what students and non-JW family members do?)