the applicant to reformulate the application so as to avoid causing such interference. Repeated requests 18. (1) A public authority dealing with a request under this Part for access to a document, or an application under section 39 for the correction of personal information, may refuse to grant access to the document, or to correct information, in accordance with the request or application, without having caused the processing of the request or application to have been undertaken, if the public authority is satisfied that (a) the request or application is made by, or on behalf of, a person who, on at least one previous occasion, has made a request or application to the public authority, or to a predecessor of the public authority, for access to the same document or for the same correction; (b) the request or application was refused and the High Court, on reviewing the decision to refuse the request or application, confirmed the decision; and (c) there are no reasonable grounds for making the request or application again. (2) A public authority shall give the applicant notice, in writing, of a refusal under subsection (1) and shall inform the applicant of - Reasons for decisions to be given (a) the reason for the refusal; and (b) the right to apply to the High Court for judicial review of the decision and the time within which the application for review is required to be made. 19. (1) Where, in relation to a request for access to a document of a public authority, a decision is made under this Part that the applicant is not entitled to access to the document relating to the request or that provision of access to the document be deferred or that no such document exists, the public authority shall cause the applicant to be given notice, in writing, of the decision, and the notice shall - 12