A funeral service establishment shall contain a preparation room equipped with a tile, cement or other waterproof floor, proper drainage and ventilation, the necessary instruments and supplies for the preparation and embalming of dead human bodies for burial, transportation or other disposition, and separate restroom facilities. A funeral service establishment having more than one location at which it performs funeral services shall not be required to maintain more than one preparation room. The Board may adopt regulations and classifications to prescribe proper drainage and ventilation and necessary instruments and supplies in preparation rooms and separate restroom facilities.