8 information on the person’s death, and travel document information in the case of an alien. (4) Information on basic background checks and extended background checks conducted by the Security Police as referred to in the Act on Background Checks, identification data on persons subject to the background checks and the time at which the background checks were made are also recorded in the Operational Data System of the Security Police. Section 6 Other personal data files kept by the police (1) In addition to the permanent, computerized, nationwide information systems referred to in sections 2-4 and in sections 30 and 31, the police may also keep temporary or manually maintained personal data files for nationwide use. (2) With the exception of the information systems referred to in sections 2-5 and in sections 30 and 31, a police personal data file may also be established: 1) for use by more than one police unit; or 2) for use by a police unit. (3) Information necessary for the performance of duties laid down in section 1(1) of the Police Act may only be collected and recorded in police personal data files established for the purpose of performing the duties in question. Information necessary for the performance of duties laid down in section 1(3) of the Police Act may only be recorded in police personal data files established for the purpose of performing the duties in question. Section 7 File keepers