65 ILCS 5/6-4-9

(65 ILCS 5/6-4-9) (from Ch. 24, par. 6-4-9)

Sec. 6-4-9.

Oaths.

Before entering upon the duties of their respective offices all
officers, whether elected or appointed, shall take and subscribe the
following oath:

I do solemnly swear 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 .... according to the best
of my ability.

This oath, so subscribed, shall be filed in the office of the city or
village clerk.

(Source: P.A. 76-746.)