I have a little bit to add.
In Great Britain, the government has conferred protection on lakes. The speed limit in those areas is 10 kilometres an hour. They're used mainly by sailboats, because the speed limit encourages motorboats to go elsewhere.
It is possible, then, to take an approach establishing that certain lakes warrant protection and thus measures to ensure that protection going forward. They could be lakes that have significant value, are ecologically important or even play a role in tourism. That is the federal government's role.