AN ORDINANCE AMENDING ORDINANCE NO. 5749-96, SO AS TO AUTHORIZE THE REHIRING OF CERTAIN CASUAL EMPLOYEES IN THE CITy COUNCIL AND OTHER DEPARTMENTS/OFFICES  HEREIN SPECIFIED, TO COVER THE PERIOD FROM JANUARY TO  FEBRUARY 1997, THE WAGES AND CONTRIBUTIONS NECESSARY THEREOF CHARGEABLE TO THE SAVINGS OF THE UNFILLED POSITIONS IN THE SAID OFFICES