Constitution of the State of Illinois Art. IV, § 15. Adjournment

(a) When the General Assembly is in session, neither house without the consent of the other shall adjourn for more than three days or to a place other than where the two houses are sitting.

(b) If either house certifies that a disagreement exists between the houses as to the time for adjourning a session, the Governor may adjourn the General Assembly to a time not later than the first day of the next annual session.