5 another comparable reason; the use of the personal data file is based on an appropriate research plan and a person or a group of persons responsible for the research have been designated; (3) the personal data file is used and data are disclosed therefrom only for purposes of historical or scientific research and the procedure followed is also otherwise such that the data pertaining to a given individual are not disclosed to outsiders; and (4) after the personal data are no longer required for the research or for the verification of the results achieved, the personal data file is destroyed or transferred into an archive, or the data in it are altered so that the data subjects can no longer be identified. The provision in paragraph (1)(3) does not apply if the procedure in that paragraph is manifestly unnecessary for the protection of the privacy of the data subjects owing to the age or quality of the data in the personal data file. The provisions in paragraph (1) apply in a supplementary manner where the processing of the personal data is based in section 8(1). (2) (2) (3) Section 15 — Statistics Personal data may be processed for statistical purposes also for a reason not referred to in section 8(1), if: (1) the statistics cannot be compiled or the underlying data requirements fulfilled without using personal data; (2) the compilation of statistics is an activity where the controller is engaged in; and (3) the file is used for statistical purposes only and data are not disclosed from it in a way allowing for the identification of a given individual, except where the data are disclosed for official statistics. Section 16 — Official plans and reports For purposes of official planning and reporting, an authority may collect and record personal data, also for a reason not referred to in section 8(1), into an official personal data file; in this event, the provisions in section 14 apply in so far as appropriate. Section 17 — Public registers (1) Unless prohibited by the data subject, data may be collected and recorded, also for a reason not referred to in section 8(1), into a personal data file kept for purposes of a public register, as follows: identifying data on the data subject, his/her spouse, children and parents, data on the connecting factor on the basis of which the public register has been compiled and related data, as well as the data subject’s contact information. (2) Here a public register means a publication where the data subjects are connected by a given profession or education, by the membership of a professional body or other community or by status or achievement in culture, sports, business or other civic activity, or by another comparable circumstance. (3) For purposes of a public register referred to in paragraph (1), data that may under that paragraph be collected and recorded into such a file may be disclosed from another file, unless prohibited by the data subject. Section 18 — Genealogical research (1) Unless prohibited by the data subject, data may be collected and recorded, also for a reason not referred to in section 8(1), into a personal data file kept for the purposes of genealogical research, as follows: identifying data on the member of a family and his/her spouse, the other data required for genealogical research and the data subject’s contact information. (2) For purposes of a genealogical register referred to in paragraph (1), data that may under that paragraph be collected and recorded into such a file may be disclosed from another file, unless prohibited by the data subject. Section 19 — Direct marketing and other personalised mailing (1) Unless such processing has been prohibited by the data subject, personal data may be collected and recorded, also for a reason not referred to in section 8(1), into a personal data file kept for