(1) An * employment termination payment includes a pre - July 83 segment if any of the employment to which the payment relates occurred before 1 July 1983.
(2) Work out the amount of the pre - July 83 segment as follows:
Step 1. Subtract the * invalidity segment (if any) from the * employment termination payment.
Step 2. Multiply the amount at step 1 by the fraction: