(1) a waiting area, appropriate to the type of certified service, that is sized and furnished for the comfort, convenience, and confidentiality of persons waiting for services, and that may be supervised to control access to the facility, prevent entry by unauthorized persons, and ensure confidentiality pursuant to Federal law;

(2) space for provision of individual and group treatment appropriate to the type of certified service; and

(3) space for provision of medical services appropriate to the type of certified service.