Thousands of Lake District boat owners have been told there is no chance of a planned speed limit for Windermere being scrapped.
The speed limit comes into force in March 2005
A long-running campaign has urged the Lake District National Park Authority to halt the proposed 10mph speed limit.
The authority says it will make the lake a more tranquil place to visit.
Now a newsletter is being sent to more than 6,000 registered boat owners, asking them to "finally accept" the speed limit in March 2005.
The newsletter also offers an olive branch by offering them the chance to shape the way part of the lake's future funding is structured.
The annual Lake Windermere Newsletter also contains a detailed map illustrating what lake users will be allowed to do next year.
In it, chairman of the Authority Michael Bentley hits out at personal attacks made against him this year, and demonstrations on Coniston Water, which lead to court action.
He added: "We will continue to take a tough line with those who break the law.
"The decision for a 10mph speed limit on Windermere will not be overturned."
Opponents to the speed limit say they will continue their campaign.
In January, the Lake District National Park Authority ruled out alternative proposals to the speed limit put forward by the Keep Windermere Alive Association.
Campaigners said a formal safety assessment suggested the speed limit could be potentially more hazardous to users of the lake.