Tier 1

If your date of membership is June 17, 1971, or later, the wages in any 12-month period used in the FAS calculation cannot exceed the earnings in the preceding 12-month period by more than 20 percent. Any amount in excess of 20 percent is excluded from the computation of your FAS.

Tier 2

If the earnings in any year included in the FAS period exceed the average of the previous two years by more than 20 percent, the amount in excess of 20 percent is excluded from the computation of your FAS. Payment for accumulated vacation is not included in the calculation of your FAS.