In the case of employees covered by an unexpired collective bargaining agreement that expires on or after September 1, 1989, or by an employee benefit program or plan with a stated year ending on or after September 1, 1989, the effective date of RCW 49.12.360 shall be the later of:
RCW 49.12.370
Effective date-1989 1st ex.s. c 11: See note following RCW 49.12.350.