Sec. 6.022. AUTHORITY TO REDUCE RETIREMENT AGE. Notwithstanding any other law, the board may reduce the age at which a Group B member is eligible to begin receiving a retirement pension, including an actuarially reduced retirement pension, under Section 6.02 of this article if the board determines that the reduction will not cause the amortization period of the unfunded actuarial accrued liability of the pension system to exceed 25 years, after taking into account the impact of the reduction. A board action under this section may not take effect until the State Pension Review Board reviews the board's determination described by this section.