In addition to the authority to prescribe minimum standards, the Department may adopt license classifications of facilities according to the levels of service, and if license classification is adopted the applicable minimum standards shall define the classification. In adopting classification of the license of facilities, the Department may give recognition to the classification of services defined or prescribed by federal statute or federal rule or regulation. More than one classification of the license may be issued to the same facility when the prescribed minimum standards and regulations are met.
210 ILCS 46/3-204