225 ILCS 320/11
The Director shall issue a plumber's license to each applicant who successfully passes the examination and has paid to the Department the required license fee. Each plumber's license shall be issued in the name of the Department with the seal thereof attached. Each plumber's license shall be composed of a solid plastic card that includes a photo of the licensed plumber printed directly on the card.
A person once licensed as a plumber under the provisions of this Act shall not be relicensed except by renewal or restoration of such license as provided in this Act.
An applicant who is 21 years of age or older seeking a religious exemption to the photo requirement of this Section shall furnish with his or her application an approved copy of United States Department of the Treasury Internal Revenue Service Form 4029. Regardless of age, an applicant seeking a religious exemption to this photo requirement shall submit fingerprints in a form and manner prescribed by the Department with his or her application in lieu of a photo.
225 ILCS 320/11