92 Ill. Adm. Code 554.208
Supplemental Permits
Section 554
Section 554.208 Supplemental
Permits
Supplemental permits may be
issued by the Permit Office to extend, revise, or correct permits that are
still valid. Documents authorizing corrections, extensions, and revisions must
accompany the original permit and be presented upon request to any police
officer or authorized employee of the Department.