40 ILCS 5/7-123: Effective rate of interest.

"Effective rate of interest": The interest rate determined by the Board for any calendar year which shall distribute, to the extent reasonably determinable prior to the year for which the rate is applicable, the current earnings (excluding capital gains) on assets of the fund to reserves as provided by Section 7-209, after due allowance is made for special reserve requirements under Section 7-208.