“and other members of staff may enter at any time.”
That could work by a physical doctor. But a therapist generally don’t allow anyone to enter the room with them patient in therapy.
In fact, many of the above guidelines work with a physician but are inapplicable by a therapists where often there usually isn’t even anyone in the waiting room. And even if there is a secretary or someone, they know they cannot enter the room with the therapist and the patient.