For the years before 1962 the tax rate shall be as provided in "The 1925 Act". For the years 1962 and 1963 the tax rate shall be not more than .0200 per cent; for the years 1964 and 1965 the tax rate shall be not more than .0202 per cent; for the years 1966 and 1967 the tax rate shall be not more than .0207 per cent; for the year 1968 the tax rate shall be not more than .0220 per cent; for the year 1969 the tax rate shall be not more than .0233 per cent; for the year 1970 the tax rate shall be not more than .0255 per cent; for the year 1971 the tax rate shall be not more than .0268 per cent of the value, as equalized or assessed by the Department of Revenue upon all taxable property in the county. Beginning with the year 1972 and for each year thereafter the county shall levy a tax annually at a rate on the dollar of the value, as equalized or assessed by the Department of Revenue of all taxable property within the county that will produce, when extended, not to exceed an amount equal to the total amount of contributions made by the employees to the fund in the calendar year 2 years prior to the year for which the annual applicable tax is levied multiplied by .8 for the years 1972 through 1976; by .8 for the year 1977; by .87 for the year 1978; by .94 for the year 1979; by 1.02 for the year 1980 and by 1.10 for the year 1981 and by 1.18 for the year 1982 and by 1.36 for the year 1983 and by 1.54 for the year 1984 and for each year thereafter.
This tax shall be levied and collected in like manner with the general taxes of the county, and shall be in addition to all other taxes which the county is authorized to levy upon the aggregate valuation of all taxable property within the county and shall be exclusive of and in addition to the amount of tax the county is authorized to levy for general purposes under any laws which may limit the amount of tax which the county may levy for general purposes. The county clerk, in reducing tax levies under any Act concerning the levy and extension of taxes, shall not consider this tax as a part of the general tax levy for county purposes, and shall not include it within any limitation of the per cent of the assessed valuation upon which taxes are required to be extended for the county. It is lawful to extend this tax in addition to the general county rate fixed by statute, without being authorized as additional by a vote of the people of the county.
Revenues derived from this tax shall be paid to the treasurer of the county and held by the treasurer for the benefit of the fund.
If the payments on account of taxes are insufficient during any year to meet the requirements of this Article, the county may issue tax anticipation warrants against the current tax levy.
If it is not possible or practicable for the county to make contributions for age and service annuity and widow's annuity concurrently with the employee contributions made for such purposes, such county shall make such contributions as soon as possible and practicable thereafter with interest thereon at the effective rate until the time it shall be made.
40 ILCS 5/9-169