74 Ill. Adm. Code 900.60
When a Payment is Late
Section 900
Section 900.60 When a
Payment is Late
For bills payable from funds
appropriated prior to FY03, a payment is late if the Date of Payment is not
within 60 days after the Date of Approval of the Vendor's bill. For bills
payable from funds appropriated on and after July 1, 2002, a payment is late if
the Date of Payment is not within 60 days after the receipt of a Proper Bill. For
bills payable from funds appropriated on and after December 28, 2012, a payment
is late if the Date of Payment is not within 90 days after the receipt of a
Proper Bill.