17.This states the circumstances in which an applicant or a public authority may appeal to the Tribunal when a decision notice, information notice, or enforcement notice has been served. It also states the circumstances in which a party to an appeal to the Tribunal can appeal to the courts on a point of law. It lays down the circumstances in which the Tribunal can hear appeals against the issue of a certificate in national security cases. It also provides for appeal procedures through amendments to the Data Protection Act 1998 as detailed in Schedule 4.