Va. Code Ann. § 15.2-5333

An authority shall have power to make rules governing the admission of patients to, and the care, conduct, and treatment of patients in, any hospital operated by the authority; to determine whether patients presented to the hospital for treatment are subjects for charity, to fix the compensation to be paid by patients other than those unable to assist themselves; and to maintain and operate isolation wards for the care and treatment of mental, contagious or other similar diseases.