Ill. Admin. Code tit. 44, § 1400.2525
a) Policy
When determined by the Chief Procurement Officer to be in the best interest of the State, the Treasurer's office may make multiple awards under any solicitation.
b) Specific Goods and Services Following Multiple Awards
2) When the solicitation did not list the specific good or service sought but led to multiple awards to vendors similarly qualified to provide the good or service, the specific good or service may be purchased from one of the multiple awardees; provided, however, that for the purchase of that good or service:
Subject to this subsection, specific goods and services may be purchased following multiple awards:
(Source: Added at 43 Ill. Reg. 2275, effective January 31, 2019)