For an impromptu event to be valid, the registered car owner must be a paid up member of JDCQ at the occurrence of the event. No backdated events can be entered and for an event to be valid, it must be entered before the event start time. The calendar system records the date and time an event is entered in the calendar and any backdated event will be deleted as invalid. Events cannot relate to travel to or from work. Noncompliance with these requirements may result in a breach of the car owners SIVS registration and thus invalidate the car owners insurance.