 The procedure is similar for a bill mentioned in paragraph 2, except that if the Constitutional Tribunal rules that the bill has a circumventing or curtailing effect, the Prime Minister has no power to put the bill to a referendum.This ensures that changes to the President's discretionary powers can only be made by way of constitutional amendments and not ordinary statutes.If the President withholds his assent to any Supply Bill, Supplementary Supply Bill or Final Supply Bill referred to in paragraph 5 contrary to the recommendation of the Council of Presidential Advisers, Parliament may by resolution passed by not less than two-thirds of the total number of elected MPs overrule the decision of the President.