30 ILCS 500/1-30

Applicability to Constitutional Officers and the Legislative and Judicial Branches.

(a) The constitutional officers shall procure their needs in a manner substantially in accordance with the requirements of this Code and shall promulgate rules no less restrictive than the requirements of this Code.

(b) The legislative and judicial branches are exempt from this Code. The legislative and judicial branches shall make procurements in accordance with rules promulgated to meet their needs. Procurement rules promulgated by the legislative and judicial branches may incorporate provisions of this Code.