Credited interest percentage and return assumption. Revised actuarial valuation and certification to General Assembly.

(b) If the board revises such percentage and adopts such return assumption in accordance with subsection (a) of this section, the board shall, on or before July 1, 2019, and notwithstanding the provisions of subsection (a) of section 10-183z : (1) Request a revised actuarial valuation for the fiscal years ending June 30, 2020, and June 30, 2021, based on changes to the benefit program, amortization period and the systematic program of annual payments applied to determine the amortization of unfunded liabilities of the Connecticut teachers' retirement system as provided in subdivision (2) of section 10-183b and section 10-183z ; and (2) certify to the General Assembly for such fiscal years the amount necessary, based on such revised actuarial valuation, to maintain the Teachers' Retirement Fund on an actuarial reserve basis.