30 ILCS 425/9
Proceeds from the sale of Bonds (other than refunding Bonds) shall be deposited in the separate fund in the State Treasury known as the Build Illinois Bond Fund and shall be expended only pursuant to appropriation by the General Assembly. Proceeds to be deposited into any debt service or reserve funds as may be required under any trust indenture shall be paid from the Build Illinois Bond Fund to the trustee under the trust indenture specified in the Bond Sale Order at the time of the delivery of the Bonds as directed in the Bond Sale Order. Accrued interest paid to the State at the time of the delivery of any series of Bonds shall be deposited into the Build Illinois Bond Retirement and Interest Fund in the State Treasury and shall be paid immediately from that Fund to the trustee under the trust indenture specified in the Bond Sale Order.
30 ILCS 425/9