23 (4) Notwithstanding the provisions laid down in subsections 1 and 3, all information held on a person is deleted from the system no later than one year after the data subject’s death. (5) Notwithstanding the provisions laid down in subsections 1-4 concerning investigation and executive assistance data, identification data, property data and searched motor vehicle data, this data is not deleted if its retention is necessary for investigational or supervisory reasons related to the report in question. Personal data is not deleted either 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. (6) Regardless of the retention period laid down in subsections 1-5, investigation and executive assistance archive data is, nevertheless, deleted 50 years after the report was recorded. Section 23 Deleting data from the Data System for Administrative Matters (1) Data in the Data System for Administrative Matters is deleted as follows: 1) in the case of data on firearms permits and licences, data on decisions is deleted ten years after the decision or its expiry or the end of the validity period stated in the decision, permit or licence data is deleted ten years after the end of the validity period of the permit or licence, and data on obstacles or reprimands and other recorded data are deleted ten years after the entry of the data; 2) in the case of identity card and passport data and security sector supervision data, data on decisions is deleted ten years after the decision or its expiry or the end of the validity period stated in the decision, and data on obstacles, reprimands and examinations and other recorded data are deleted ten years after the entry of the data;