"Public building" means:
"Restaurant" means a business having sales of ready-to-eat food for immediate consumption comprising at least 51% of the total sales, excluding the sale of liquor.
This requirement is in addition to any accommodations that may be made for individuals in accordance with any local, State, or federal laws regarding access for persons with disabilities and to existing fire, health, and safety codes or standards.
410 ILCS 35/18