There is a new Work Health and Safety Act coming out in 2012. Coupled with it is another act called, Safety in Recreational Water Activities Act 2011.
Anyone wanting to run a PWC (jetski) business will now have a very heavy onus to ensure the punters and bystanders safety.
This act might also have an impact on the board racing community as well. (i haven't got my head around it all yet

Bruised