If a medical device was originally registered under a higher-level classification and is now subject to a lower-level classification, the registration certificates will continue to be valid. Upon expiration of the certificates, the medical device will be registered under the new classification. If the medical device was originally registered under a lower-level classification and is now subject to a higher-level classification, the medical device manufacturer should apply for re-registration pursuant to Article 35 of the Administrative Measures on Registration of Medical Devices. The original certificate continues to be valid until the re-registration is completed. For those medical devices no longer subject to any classification, the original certificates will cease to be used.