The person in charge of every private hospital for mental illness in the state shall, on a quarterly basis, supply the commissioner of mental health in writing with statistics which state the number of admissions and discharges of mentally ill persons for the preceding quarter. For the purpose of this regulation, "private hospital for mental illness" shall mean any private hospital, retreat, institution, house or place in which any mentally ill adult is received or detained as a patient and a person shall be considered "mentally ill" only if his or her primary diagnosis is one of mental illness.
Conn. Agencies Regs. § 17-183-1