26. The Speaker or in his absence the Deputy Speaker of the House of Representatives shall certify a bill which in his opinion is a money bill to be a money bill and such certificate shall be final and conclusive:
Provided that if before the expiration of— days from the day of which a bill so certified is sent by the House of Representatives to the Senate for its consideration, two-fifths of the members of either Chamber by notice in writing addressed to the Speaker or in his absence to the Deputy Speaker of the Chamber of which they are members so require, or a majority of the members of the Senate present and voting at a sitting of the Senate at which not less than-members are present so resolve, the question whether a bill is a money bill or is not so shall be forthwith referred to the Chief Justice of the Supreme Court and his decision shall be final and conclusive.