410 ILCS 620/9
Definitions and standards of identity, quality and fill of container and supplements thereto or revisions thereof, adopted under authority of the Federal Food, Drug and Cosmetic Act are the definitions and standards of identity, quality and fill of container in this State except insofar as modified or rejected by regulations promulgated by the Director. In addition, the Director of Agriculture may promulgate regulations which set standards of identity, quantity and fill of container for foods.
Temporary permits now or hereafter granted for interstate shipment of experimental packs of food varying from the requirements of federal definitions and standards of identity are automatically effective in this State under the conditions provided in such permits. In addition, the Director may issue additional permits where they are necessary to the completion or conclusiveness of an otherwise adequate investigation and where the interests of consumers are safeguarded. Such permits are subject to the terms and conditions the Director may prescribe by regulation.
Any regulations prescribing definitions and standards of identity for milk and milk products shall conform to the Grade A Pasteurized Milk and Milk Products Act.
When in the judgment of the Director of the Department of Agriculture such action will promote honesty and fair dealing in the interest of consumers, the Director of the Department of Agriculture shall promulgate regulations establishing a reasonable standard of quantity and fill of container for food. In prescribing a definition and standard of identity for any food in which optional ingredients are permitted, the Director shall, to promote honesty and fair dealing in the interest of consumers, designate the optional ingredients which shall be named on the label. The definitions and standards so promulgated shall conform so far as practicable to the definitions and standards promulgated under authority of the Federal Act, the Federal Meat Inspection Act or the Federal Poultry Inspection Act.
410 ILCS 620/9