The best example I can give you is the H1N1 disaster we just went through. We had no fewer than 14 ways to immunize people against H1N1. How ridiculous. There's really only one way to immunize people properly.
That's the trouble we have right now. Each province is helter-skelter introducing its own legislation. I don't know what the hell it's based on, but it's sure not based on science.
Even if the feds had a repository of what the evidence says should be done that governments can go to, whether they choose to do that is up to them. That's why we end up with 14 different strategies for doing things there should be only one way to do, and it should be based on evidence.