(a) excluding, for the purposes of this Act, any provision or any part of a provision of the Consumption Tax Acts, the Newfoundland and Labrador Income Tax Act, the Insurance Companies Tax Act or the Petroleum and Natural Gas Act as defined in subsection 97(1) or of any regulation referred to in subsection 97(4.1), 207(3.1), 208(3) or 211(3.1) that is inconsistent with this Act, the Atlantic Accord or any bilateral or international treaty, convention or agreement respecting taxation, tariffs or trade to which the Government of Canada is a signatory; and