The Bay of Plenty Regional Council want to remind locals it takes three to ski these summer holidays.
Any boat towing a skier, biscuit, wake board or similar device needs an observer.
The council said boatie behaviour on Tauranga Harbour had been good this summer, but Regional Council's patrols were finding that not having an observer when towing or skiing seemed to be the rule being broken within the Navigation Safety Bylaw.
Bay of Plenty Harbourmaster Peter Buell said the rule existed to ensure the driver was focused on looking ahead and scanning for hazards.
"With so many vessels, swimmers and hazards in the water its vital skippers keep their eyes ahead. If you are towing someone - be it on water skis or a biscuit or anything else - they must have an extra person on board to be a spotter. This includes jet skis."
"This is not a new rule so people need to be aware that if they break the rule they may receive an infringement notice," he said.
The other rules being broken were exceeding 5 knots within 200m of shore or within 50m of another vessel and failing to carry enough properly fitting life jackets for everyone on board.
The water skiing rules:
It takes three to ski - you must have an observer when towing or skiing so they can communicate to the driver the actions of the person being towed.
An observer must be 10 years old or over.
Skiing from shore is only permitted within a designated ski access lane or ski reserved area.
The skier must wear a lifejacket.
Please consider the effect your wake may have on other craft.
No water skiing after sunset or before sunrise.
For information on the boating rules for Bay of Plenty checkout www.boprc.govt.nz/harboumaster