30 ILCS 535/15
As used in this Act:
"Architectural services" means any professional service as defined in Section 5 of the Illinois Architecture Practice Act of 1989.
"Engineering services" means any professional service as defined in Section 4 of the Professional Engineering Practice Act of 1989 or Section 5 of the Structural Engineering Practice Act of 1989.
"Firm" means any individual, sole proprietorship, firm, partnership, corporation, association, or other legal entity permitted by law to practice the profession of architecture, engineering, or land surveying and provide those services.
"Land surveying services" means any professional service as defined in Section 5 of the Illinois Professional Land Surveyor Act of 1989.
"Project" means any capital improvement project or any design, study, plan, survey, or new or existing program activity of a State agency, including development of new or existing programs that require architectural, engineering, or land surveying services. "Project" also includes any land acquisition that is conducted by either the Department of Transportation or Illinois Toll Highway Authority and that requires architectural, engineering, or land surveying services.
"State agency" means any department, commission, council, board, bureau, committee, institution, agency, university, government corporation, authority, or other establishment or official of this State.
30 ILCS 535/15