New boat ramp rules to stop the spread of aquatic pests a NZ first 14 Jan, 2021 10:58 PM 2 minutes to read Preventing the spread of aquatic pests that can choke lakes is vital. Photo / File Rotorua Daily Post New rules to stop the spread of aquatic pests across the Bay of Plenty come in to force this summer with boat ramp users now required to self-certify that their vessels and trailers are free from freshwater fish and plant pests. Bay of Plenty Regional Council Biosecurity Manager Greg Corbett said the rules contained within the Bay of Plenty Regional Pest Management Plan 2020 to 2030, ensured lake users took an active role in protecting the long term health of the region's lakes and rivers.