[CaptainCrunch]

no its one or the other with the expectation that the provincial one will at least match the federal one.

I looked up the constitutional challenges of carbon taxes in Australia where their supreme court ruled that carbon was the property of the state, not the federal government.

The challenge for the Federal government is that for it to pass the constitutional challenge it can't be a tax but a revenue neutral levy from what I understand. So Wall is either going to site Australia which has a similar constitution to Canada or challenge that the government is imposing a tax under the guise of a levy which will fail the challenge.

But I'm no lawyer