If a physician assistant is employed by a physician or group of physicians, the physician assistant must be supervised by and be the legal responsibility of the employing physician. The legal responsibility for the physician assistant's patient care activities remains that of the employing physician, including when the physician assistant provides care and treatment for patients in health care facilities. If a physician assistant is employed by a health care facility or other entity, the legal responsibility for the physician assistant's actions or omissions is that of the employing facility or entity. Licensed physicians shall supervise physician assistants employed by such facilities.