The City Clerk is hereby authorized, empowered and directed to issue warrants on and against said fund in payment of services rendered to the City by its various officers and employees. Said warrants shall be issued only after there has been filed with the City Clerk properly certified payrolls, due bills, or time certificates stating the department involved, the amount due or owing, and the persons entitled thereto; provided, it shall not be necessary to have a certified payroll for regular officers and employees of the City of Pullman whose remuneration has been specifically designated by ordinance, except as otherwise provided by law. (Ord. A-20 §4, 1943).