The contributions of all school employers with respect to school members shall be applied by the board during each fiscal year to meet the obligations of all school employers collectively with respect to school members under this system as follows:
(a)
First, in an amount equal to the liabilities accruing (1) because of state service of members for which normal contributions have been made, (2) on account of current service pensions and disability retirement pensions, and (3) the portion of death allowances provided from employer contributions. The amount shall be determined by the most recent actuarial valuation as interpreted by the actuary.
(b)
Second, in an amount equal to the payments of death benefits made from employer contributions during the fiscal year for deaths not qualifying for death allowances.
(c)
Third, the balance of the contributions, on the liabilities accrued on account of prior service pensions.