Any person or persons, jointly or severally aggrieved by any decision of any City officer, board commission or the Common Council under this Ordinance, including any taxpayer, or any officer, department, board or bureau so aggrieved or the Common Council, may, within 30 days of the date of such decision, commence an action seeking the remedy available by way of certiorari in the Milwaukee County Circuit Court, except where a specific other remedy or appeal procedure is otherwise specified under this Ordinance. Such action for certiorari shall be the sole remedy of any such person(s) aggrieved.