730 ILCS 5/3-7-3

(a) Standards of sanitation and safety for all institutions and facilities shall be established and enforced by the Department. All buildings and facilities shall be cleaned regularly and properly maintained. Ventilation of air and heat adequate to the climate and season shall be provided. (b) All new, remodeled and newly designated institutions or facilities shall provide at least 50 square feet of cell, room or dormitory floor space.