20 ILCS 2505/2505-310
The Department has the power to expend sums that the Director deems necessary from contractual services appropriations for the purchase of evidence and for the employment of persons to obtain evidence. The sums shall be advanced to investigators authorized by the Director to expend funds, on vouchers signed by the Director.
In addition, the Director is authorized to maintain one or more commercial checking accounts with any State banking corporation or corporations organized under or subject to the Illinois Banking Act for the deposit and withdrawal of moneys to be used solely for the purchase of evidence and for the employment of persons to obtain evidence. No check may be written on nor any withdrawal made from such an account except on the written signature of 2 persons designated by the Director to write those checks and make those withdrawals. The balance of moneys on deposit in any such account shall not exceed $25,000 at any time, nor shall any one check written on or single withdrawal made from any such account exceed $25,000 .
20 ILCS 2505/2505-310