Ill. Admin. Code tit. 44, § 1.5460
In any cooperative or joint purchase, each participant must issue its own purchase order, accept its own deliveries, and make its own payments. Neither the CPO-GS nor any State agency shall have any obligation to the vendor for payment of orders placed by other governmental units or qualified not-for-profit agencies.
(Source: Amended at 46 Ill. Reg. 10208, effective June 2, 2022)