The following definitions are applicable to this Part.

"Business" means a firm that is engaged in interstate or intrastate commerce for the purpose of manufacturing, processing, assembling, warehousing, or distributing products, conducting research and development, providing tourism services, or providing services in interstate commerce, office industries, or agricultural processing, but excluding retail, retail food, health, or professional services. [20 ILCS 605/605-456(c)]

"Department" means the Department of Commerce and Economic Opportunity.