(1) The pre - 16/8/78 period consists of each day (if any) in your * long service leave employment period that occurred before 16 August 1978.
(2) The pre - 18/8/93 period consists of each day (if any) in your * long service leave employment period to which the payment relates that occurred after 15 August 1978 and before 18 August 1993.
(3) The post - 17/8/93 period consists of each day (if any) in your * long service leave employment period to which the payment relates that occurred after 17 August 1993.
(4) Your long service leave employment period , for a period of long service leave, is:
(a) the period of employment to which the long service leave relates; or
(b) if your entitlement to long service leave changes so that it accrues over a shorter period--the period that would apply under paragraph (a) assuming the change had not happened.