Conn. Gen. Stat. § 5-165

(1) A reduced amount payable to the member for his lifetime, with the provision that after his death his spouse, if surviving, shall be entitled to receive a lifetime income equal to fifty per cent of the reduced monthly amount payable to the member;

(2) A reduced amount payable to the member for his lifetime, with the provision that after his death, his contingent annuitant shall be entitled to receive a lifetime income equal to either fifty or one hundred per cent of the reduced amount payable to the member;

(3) A reduced amount payable to the member for his lifetime, with the provision that if he shall die within either a ten or twenty-year period following the date his retirement income commences, whichever is selected by the member, the reduced amount continues to his contingent annuitant for the balance of the ten or twenty-year period; or

(4) An amount payable to the member for his lifetime, with no payments continuing after the member's death, except for a lump sum death benefit as provided in subsection (b) of section 5-168 .

(b) Notwithstanding the provisions of subsection (a) of this section, a temporary minimum shall apply whenever the Retirement Commission adopts revised factors which could result in a smaller benefit to a member than would have been payable under the previously existing factors. Such minimum shall be determined as follows: (1) The benefit the member had earned as of the date of the change in factors shall be calculated, based on his final earnings and service as of that date; (2) any early retirement reduction in such benefit shall be based upon his age, as determined on the date benefits will commence, and his type of retirement; and (3) the option factor shall be determined utilizing the factors in effect prior to such change, but based on appropriate ages as of the date benefits will commence. If such minimum results in a larger benefit, the larger benefit shall be payable.