Illinois Statutes Chapter 30. Finance § 500/30-15. Method of source selection

(a) Competitive sealed bidding. Except as provided in subsections (b), (c), and (d) and Sections 20-20, 20-25, and 20-30, all State construction contracts shall be procured by competitive sealed bidding in accordance with Section 20-10.

(b) Other methods. The Capital Development Board shall establish by rule construction purchases that may be made without competitive sealed bidding and the most competitive alternate method of source selection that shall be used.

(c) Construction-related professional services. All construction-related professional services contracts shall be awarded in accordance with the provisions of the Architectural, Engineering, and Land Surveying Qualifications Based Selection Act.  1 “Professional services” means those services within the scope of the practice of architecture, professional engineering, structural engineering, or registered land surveying, as defined by the laws of this State.

(d) Correctional facilities. Remodeling and rehabilitation projects at correctional facilities under $25,000 funded from the General Revenue Fund are exempt from the provisions of this Article. The Department of Corrections may use inmate labor for the remodeling or rehabilitation of correctional facilities on those projects under $25,000 funded from the General Revenue Fund.