Determination of rate of state levy--Certification and deduction of amounts available from other sources

The board of equalization, in determining the rate of tax to be levied against the taxable property in the state, shall ascertain the amount in dollars necessary to meet the estimated ordinary expenses of the state for each year; the amount in dollars necessary to pay the deficiency of the preceding years and the amount in dollars necessary to pay the annual interest and to provide a debt service fund for the payment of the public debt of the state. When these amounts have been ascertained, the board shall require the commissioner of finance and management to certify to such board of equalization the amounts available in the general fund of the state and the probable amounts to become available during the year, from whatever source other than the general property tax. The board of equalization shall then deduct from the amount ascertained to be necessary to meet the requirements of the state for the purposes hereinbefore enumerated the amounts so certified to it by the commissioner of finance and management and as ascertained and determined by such board as being or to become available in the general fund, and shall then levy a tax against the taxable property in the state sufficient only to provide the revenues necessary to equal the balance of the sum ascertained to be necessary to meet the requirements of the state for the purposes hereinbefore enumerated.