Ill. Admin. Code tit. 77, § 225.7030
a) The number of resident beds in a nursing unit shall not exceed 20 beds.
b) General Requirements for Bedrooms
c) Resident Bedrooms
Single resident bedrooms shall contain at least 100 square feet. Multiple resident bedrooms shall contain at least 80 square feet per bed. Minimum usable floor area shall be exclusive of toilet rooms, closets, lockers, wardrobes, alcoves, vestibules, or clearly definable entryways.
d) Special Care Room
e) Nurses' Station
f) Bath and Toilet Rooms
g) Utility Rooms
h) Medication Facilities