Official Information (c) (d) (e) 19 shall ensure that, where the request is made by an agent of the person, the agent has the written authority of that person to obtain the information or is otherwise properly authorised by that person to obtain the information; shall ensure that, where the request is made by a legal guardian of the person, the guardian has been appointed as such by a Court of competent jurisdiction and that the order remains in effect; shall ensure that, where the request is made by a trustee of the person, the trustee has been appointed as such by the High Court and that the order remains in effect. 28. Correction of information – (1) Every person who is given access under section 26(1) of this Act to personal information may, by letter addressed to the Ministry or Minister of the Crown or organisation, (a) request correction of the personal information where the person believes that the information – (i) is inaccurate; or (ii) is incomplete and gives a misleading impression; and (b) require that a notation be attached to the information indicating the nature of any correction requested but not made. (2) Where a Ministry or Minister of the Crown or organisation receives a letter pursuant to subsection (1) of this section, it or he or she shall inform the person by whom or by which the letter was sent of the action taken by the Ministry or Minister of the Crown or organisation as a result of the letter. 29. Reasons for refusal of request for personal information – (1) A Ministry or Minister of the Crown or organisation may refuse to disclose any personal information requested under section 26(1) of this Act if, and only if, (a) the disclosure of the information would be likely to prejudice any of the interests protected by section 6(a) to (d) or section 7 or section 8(2)(b) of this Act and (in the case of the interests protected by section 8(2)(b) of this Act) there is no countervailing public interest; or (b) the disclosure of the information would involve the unwarranted disclosure of the affairs of another person or of a deceased person; or (c) the disclosure of the information or of information identifying the person who supplied it, being evaluative material, would breach an express or implied promise – (i) which was made to the person who supplied the information; and (ii) which was to the effect that the information or the identity of the person who supplied it or both would be held in confidence; or