35 Ill. Adm. Code 812.102
Certification by Professional Engineer
Section 812
Section 812.102Â
Certification by Professional Engineer
All designs shall be prepared
by, or under the supervision of, a professional engineer. The professional
engineer shall affix the name of the engineer, date of preparation,
registration number, a statement attesting to the accuracy of the information
and design, and a professional seal to all designs.