All other navigable waters In all navigable waters, other than in the PWC Restriction Zone and including all of the NSW coast, 'operating in an irregular manner' is not permitted within 200 metres of the shoreline where one or more dwellings are visible from the water and located within 200 metres of that shore.
Irregular drivingExamples of operating in an irregular manner include, but are not limited to: Driving in a circle or other pattern Weaving or diverting Surfing down or jumping over or across any swell, wave or wash. This means that PWC are required to be operated generally in a straight line within 200 metres of the shoreline.
Above from:
www.rms.nsw.gov.au/maritime/safety-rules/other-boating/personal-watercraft.htmlGood luck explaining the rules to them.