77 Ill. Adm. Code 300.3110
Structural
Section 300
Section 300.3110Â Structural
a)Â Â Â Â Â Â Â Â Buildings and all parts thereof shall be maintained
structurally to support all dead, live and lateral loads. (B)
b)        Buildings shall be maintained in good repair. Buildings that
show signs of distress shall be repaired immediately. (B)