Section 40 ILCS 5/13-501 - Contributions computed on actuarially funded basisThe obligations of the various annuities and benefits provided by this Article shall be financed by contributions by employees, contributions by the Water Reclamation District, income from investments and other income that may accrue to the Fund during the course of its operations. The amount to be contributed by the District for any calendar year shall be computed on an actuarially funded basis and shall be equal to the sum of the following:
(1) For retirement and surviving spouse's annuities and annual increases therefore, and child's annuities, the amount determined by the Retirement Board upon recommendation of the actuary which, when added to the amounts held by the Fund to cover liabilities for such annuities and annual increases, shall be equal to the present value, according to actuarial tables in use by the Fund, of the aggregate liability of the Fund with respect to such annuities and annual increases credited or to be credited on account of service rendered or to be rendered to the end of such calendar year, after applying as a credit against such liability the accumulated employee contributions for such service.(2) For the current annual cash requirements covering administration expense, duty disability benefits and ordinary disability benefits, the amounts to be contributed by the District shall be equal to the actual payments by the Fund for these purposes. The District contributions provided in this Section shall be allocated for the purposes for which contributions have been made, and credited to appropriate reserve accounts established by the Board.