(a) There is created a revolving fund to be known as the State Disbursement Unit Revolving Fund, to be held by the Director of the Illinois Department, outside the State treasury, for the following purposes:

(1) the deposit of all support payments received by the Illinois Department's State Disbursement Unit;

(2) the deposit of other funds including, but not limited to, transfers of funds from other accounts attributable to support payments received by the Illinois Department's State Disbursement Unit;

(3) the deposit of any interest accrued by the revolving fund, which interest shall be available for payment of (i) any amounts considered to be Title IV-D program income that must be paid to the U.S. Department of Health and Human Services and (ii) any balance remaining after payments made under item (i) of this subsection (3) to the General Revenue Fund; however, the disbursements under this subdivision (3) may not exceed the amount of the interest accrued by the revolving fund;

(4) the disbursement of such payments to obligees or to the assignees of the obligees in accordance with the provisions of Title IV-D of the Social Security Act and rules promulgated by the Department, provided that such disbursement is based upon a payment by a payor or obligor deposited into the revolving fund established by this Section; and

(5) the disbursement of funds to payors or obligors to correct erroneous payments to the Illinois Department's State Disbursement Unit, in an amount not to exceed the erroneous payments.