I've run through hull exhaust boats on Kansas lakes for years, though now I do almost all my boating on Table Rock Lake in Missouri. It is disconcerting/sad to see these new laws. Cheney Lake at one time had a HUGE flotilla of really nice jet boats, all powered by big blown engines with 'open exhausts'.
I run my Sea Doos on El Dorado on occasion, I seriously hadn't seen any sort of information regarding sound ordinances...

I hope it's a Really good job to leave FLA for Middle of Nowhere
Did I mention it Snows there

According to Ben no noise ordinance on El Do

Thanks Speedy!