Conn. Gen. Stat. § 5-192q

(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 average earnings and credited service or based on his vesting 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.