110 ILCS 45/3

Whenever any such resolution shall have been adopted by such board of trustees, a certified copy thereof, verified by the affidavit of the president of the board and under the corporate seal of such college, seminary or academy, shall be filed in the office of the Secretary of State, and a like copy filed in the office of the recorder of the county where such college, seminary or academy is located upon the filing of such certified copies, the number of trustees specified in the resolution so adopted shall be and become the legal number of trustees of such college, seminary or academy.