30. Except on a question of jurisdiction, no remedy under article 33 of the Code of Civil Procedure (chapter C-25) or extraordinary recourse within the meaning of the Code may be exercised nor any injunction granted against the Commission or its members acting in their official capacity under this Act. A judge of the Court of Appeal may, on a motion, annul by a summary proceeding any decision made or order or injunction issued contrary to the first paragraph.