Each prospective holder of a State office or other State position created by this Constitution, before taking office, shall take and subscribe to the following oath or affirmation: "I do solemnly swear (affirm) that I will support the Constitution of the United States, and the Constitution of the State of Illinois, and that I will faithfully discharge the duties of the office of .... to the best of my ability." (Source: Illinois Constitution.)
OATH OR AFFIRMATION OF OFFICE
Ill. Const. art. XIII, § 3 — under GENERAL PROVISIONS.
Ill. Const. art. XIII, § 3
OATH OR AFFIRMATION OF OFFICE