Sec. 20c.
(1) On July 1, 1974, the monthly retirement allowance payable to a retirant or beneficiary who was on the rolls as such for June, 1973, is supplemented as follows:
| Effective Date of Retirement | Percent of Increase |
| July 1, 1972 to June 30, 1973 | 1 |
| July 1, 1971 to June 30, 1972 | 2 |
| July 1, 1970 to June 30, 1971 | 3 |
| July 1, 1969 to June 30, 1970 | 4 |
| July 1, 1968 to June 30, 1969 | 5 |
| July 1, 1967 to June 30, 1968 | 6 |
| July 1, 1966 to June 30, 1967 | 7 |
| July 1, 1965 to June 30, 1966 | 8 |
| July 1, 1964 to June 30, 1965 | 9 |
| July 1, 1963 to June 30, 1964 | 10 |
| July 1, 1962 to June 30, 1963 | 11 |
| July 1, 1961 to June 30, 1962 | 12 |
| July 1, 1960 to June 30, 1961 | 13 |
| July 1, 1959 to June 30, 1960 | 14 |
| Any time before July 1, 1959 | 15 |
History: Add. 1974, Act 216, Imd. Eff. July 19, 1974