For Jessica's cancellation, what procedure does she not need to follow?

In the context of Jessica's cancellation procedure, the requirement that she does not need to follow is to remain at the venue for 30 minutes. This indicates that there is no necessity for her to be physically present at the venue after deciding to cancel the event, allowing for a more efficient use of her time and resources.

The other procedures typically involve necessary steps that would ensure clear communication and proper management of the cancellation process. Notifying the venue an hour before is crucial, as it allows the venue to adjust for her absence and possibly accommodate other events or bookings. Updating the advertisement is important to inform potential attendees that the event has been canceled, thereby preventing confusion. Submitting a written cancellation provides a formal record of her decision, which is vital for legal and logistical purposes. Thus, remaining at the venue is not part of the cancellation protocol, freeing her from this unnecessary commitment.