Ill. Admin. Code tit. 77, § 1125.550
a) Historical Service Demand
b) Projected Referrals
The applicant shall provide documentation as described in Section 1125.540(d).
c) Projected Service Demand – Based on Rapid Population Growth
If a projected demand for service is based upon rapid population growth in the applicant facility's existing market area (as experienced annually within the latest 24-month period), the projected service demand shall be determined as described in Section 1125.540 (e).
The number of beds to be added at an existing facility is necessary to reduce the facility's experienced high occupancy and to meet a projected demand for service. The applicant shall document subsection (a) and either subsection (b) or (c).