5 ILCS 255/2
All courts, and judges, and the clerks thereof, the county clerk, deputy county clerk, the Secretary of State, notaries public, and persons certified under the Illinois Certified Shorthand Reporters Act of 1984 may administer all oaths of office and all other oaths authorized or required of any officer or other person, and take affidavits and depositions concerning any matter or thing, process or proceeding commenced or to be commenced, or pending in any court or before them, or on any occasion wherein any affidavit or deposition is authorized or required by law to be taken.
The same functions may be performed by any commissioned officer in active service of the armed forces of the United States, within or without the United States. Oaths, affidavits or depositions taken by or affirmations made before such officers need not be authenticated nor attested by any seal nor shall any instruments executed or proceedings had before such officers be invalid because the place of the proceedings or of the execution is not stated.
5 ILCS 255/2