25 (1) Data in personal data files as referred to in section 6 established for the purpose of performing duties laid down in section 1(1) of the Police Act is deleted as follows: 1) in the case of manually maintained personal data files established for nationwide use by the police, the data is deleted one year after the data subject’s death; 2) in the case of personal data files established for the use of a police unit or more than one police unit, the data is deleted ten years after the entry of the act, action or event, unless there is a need to retain the data for investigational or supervisory reasons; the need to retain the data is reviewed no later than three years after the previous occasion on which it was reviewed, and an entry is made accordingly. (2) Personal data is not deleted on the grounds referred to in subsection 1 if attached to it is information concerning the person’s own safety or the occupational safety of the police. The need to retain the data is reviewed no later than three years after the previous occasion on which it was reviewed, and an entry is made accordingly. (3) In the case of personal data files as referred to in section 6 established for the purpose of performing duties laid down in section 1(3) of the Police Act, the data is deleted one year after the data subject’s death. (4) A temporary personal data file established for police use that is no longer needed shall be destroyed unless it is transferred for archiving. Section 27 Information found to be incorrect (1) Information found to be incorrect shall be marked as incorrect, and it may be retained if this is necessary for safeguarding the rights of the data subject, another party involved or police personnel. Such information may only be used for the stated purpose of safeguarding rights.