35 Ill. Adm. Code 725.135
Required Aisle Space
Section 725
Section 725.135 Required
Aisle Space
The owner or operator must
maintain aisle space to allow the unobstructed movement of personnel, fire
protection equipment, spill control equipment, and decontamination equipment to
any area of facility operation in an emergency, unless aisle space is not
needed for any of these purposes.