(4) Where a data controller fails to rectify, block, erase or destroy inaccurate personal data, a data subject may apply to the Commissioner to have such data rectified, blocked, erased or destroyed, as appropriate. (5) Upon being satisfied by an application under subsection (4) that the personal data is incorrect, the Commissioner shall, where he is satisfied, direct the data controller to rectify, block, erase or destroy those data and any other personal data in respect of which he is the data controller. (6) Where the Commissioner – (a) issues a direction under subsection (5); or (b) is satisfied on the application by an individual that personal data of which the individual is the data subject were inaccurate and have been rectified, blocked, erased or destroyed, he may direct the data controller to notify third parties to whom the data have been disclosed, of the rectification, blocking, erasure or destruction. PART VII - EXEMPTIONS 45. National security (1) Personal data are exempt from any provision of this Act where the non-application of such provision would, in the opinion of the Prime Minister be required for the purpose of safeguarding national security. (2) In any proceedings in which the non-application of the provisions of this Act on grounds of national security is in question, a certificate under the hand of the Prime Minister referred in subsection (1) certifying that such is the case, shall be conclusive evidence of that fact. 46. Crime and taxation The processing of personal data for the purposes of -