(ii) The normal yearly amount of the retirement allowance for an eligible employee who has completed at least 30 years of creditable service and has paid the full amount of regular deductions on the total amount of regular compensation as determined under paragraph (a) of subdivision (2), shall be based on the average annual rate of regular compensation as determined under said paragraph (a) and shall be computed according to the table contained in said paragraph (a) based on the age of such member and his number of years and full months of creditable service at the time of his retirement with the percentage of salary average in such computation to be increased by 2 per cent per year for each full year of service in excess of 24 years of creditable service, and in the case of any employee who becomes a member on or after April 2, 2012, to be increased by 2 per cent per year for each full year of service in excess of 23 years of creditable service. Such member shall have served for not less than 20 years as a teacher in order to be eligible to receive the benefit provided under this subdivision. For any member who retires before age 55, his age factor shall be determined in accordance with subdivision (1) of section 10. Any member who retires before completing 30 years of service shall receive a retirement allowance equal to the retirement allowance that the member would have been eligible for had he not participated in the alternative superannuation retirement benefit program.
The total normal yearly amount of the retirement allowance, as determined in accordance with this subdivision of any employee who retires and receives an additional benefit under the alternative superannuation retirement benefit program shall not exceed four-fifths of the average annual rate of his regular compensation received during any period of three consecutive years of creditable service for which the rate of compensation was the highest or of the average annual rate of his regular compensation received during the period or periods, whether or not consecutive, constituting his last three years of creditable service preceding retirement, whichever is greater.
The total normal yearly amount of the retirement allowance, as determined under this subdivision of any employee who becomes such a member on or after April 2, 2012, and retires and receives an additional benefit under the alternative superannuation retirement benefit program shall not exceed four-fifths of the average annual rate of such member's regular compensation received during any period of 5 consecutive years of creditable service for which the rate of compensation was the highest or of the average annual rate of such member's regular compensation received during the period or periods, whether or not consecutive, constituting the member's last 5 years of creditable service preceding retirement, whichever is greater.