16 Supplying data to another police unit for a purpose other than one equivalent to data collection and recording (1) A police unit may supply data from a police personal data file established for more restricted use than nationwide use to another police unit for a purpose other than one equivalent to data collection and recording if the data is necessary: 1) for ensuring State security; 2) for countering an immediate danger threatening life or health or for preventing significant damage to property; 3) for preventing or investigating an offence subject to imprisonment; 4) for establishing a person’s identity when undertaking an individual police duty that necessarily requires verification of identity; 5) when deciding or issuing an opinion on the granting or validity of an authorization if it has been laid down that a requirement for the granting or validity of the authorization is the applicant’s or holder’s reliability, suitability or other such attribute whose assessment requires information on the state of health, intoxicant use, criminal guilt or violent behaviour of the applicant or holder. (2) Data from the Operational Data System of the Security Police referred to in section 5 and information as referred to in section 12 from a temporary personal data file as referred to in section 6(2)(2) may not, however, be supplied for the performance of the duties referred to in subsection 1(5). (3) Data from a police personal data file may also be supplied for use in police research and planning work. Such data may also be supplied for use in police training activities if the data is essential for carrying out the training.