A. A member who meets the requirements for a normal pension, who becomes a member of the system before January 1, 2012 and who has twenty years of credited service shall receive a monthly amount that equals fifty percent of the member's average monthly benefit compensation. If the member retires with other than twenty years of credited service, the foregoing amount shall be:

1. 1. Reduced by four percent for each year of credited service under twenty years, with pro rata reduction for any fractional year.
2. 2. Increased by a monthly amount equal to two percent of the member's average monthly benefit compensation multiplied by the number of the member's years of credited service in excess of twenty years, with pro rata increase for any fractional year, except that if a member retires with twenty-five or more years of credited service the amount shall be increased by a monthly amount equal to two and one-half percent of the member's average monthly benefit compensation multiplied by the number of the member's years of credited service in excess of twenty years, with pro rata increase for any fractional year.

E. A member who meets the requirements for a catastrophic disability pension is entitled to receive a monthly amount computed as follows:

1. 1. For the first sixty months, ninety percent of the member's average monthly benefit compensation before termination of employment.
2. 2. After sixty months, sixty-two and one-half percent of the member's average monthly benefit compensation before termination of employment or computed in the same manner as a normal pension using the member's average monthly benefit compensation before termination of employment and the member's actual credited service, whichever is greater.

H. A member who meets the requirements for a normal pension, who becomes a member of the system on or after January 1, 2012 and before July 1, 2017 and who has twenty-five years of credited service shall receive a monthly amount that equals sixty-two and one-half percent of the member's average monthly benefit compensation. If the member has at least fifteen years of credited service, but less than twenty-five years of service, the monthly amount shall be equal to the member's average monthly benefit compensation multiplied by the number of whole and fractional years of credited service multiplied by the appropriate percentage specified in subsection I of this section. If the member has twenty-five years of service and retires with other than twenty-five years of credited service, the foregoing amount shall be:

1. 1. Reduced by four percent for each year of credited service under twenty-five years, with pro rata reduction for any fractional year.
2. 2. Increased by a monthly amount equal to two and one-half percent of the member's average monthly benefit compensation multiplied by the number of the member's years of credited service in excess of twenty-five years, with pro rata increase for any fractional year.

I. A member who becomes a member of the system on or after July 1, 2017 and who retires on or after the member's normal retirement date shall receive a monthly amount equal to the member's average monthly benefit compensation multiplied by the number of whole and fractional years of credited service multiplied by the following:

1. 1.
2. 1. 50 percent if the member has at least fifteen years of credited service but less than seventeen years of credited service.
3. 2.
4. 1. 75 percent if the member has at least seventeen years of credited service but less than nineteen years of credited service.
5. 3.
6. 2. 00 percent if the member has at least nineteen years of credited service but less than twenty-two years of credited service.
7. 4.
8. 2. 25 percent if the member has at least twenty-two years of credited service but less than twenty-five years of credited service.
9. 5.
10. 2. 50 percent if the member has at least twenty-five years of credited service.