§ 23 Processing for other purposes by public bodies
Public bodies shall be permitted to process personal data for a purpose other than the one for which the data were collected where such processing is necessary for them to perform their duties and if
it is obviously in the interest of the data subject and there is no reason to assume that the data subject would refuse consent if he or she were aware of the other purpose;
it is necessary to check information provided by the data subject because there is reason to believe that this information is incorrect;
processing is necessary to prevent substantial harm to the common good or a threat to public security, defence or national security; to safeguard substantial concerns of the common good; or to ensure tax and customs revenues;
processing is necessary to prosecute criminal or administrative offences, to carry out or enforce punishment or measures as referred to in Section 11 (1) no. 8 of the Criminal Code or educational or disciplinary measures as referred to in the Juvenile Court Act or to enforce fines;
processing is necessary to prevent serious harm to the rights of another person; or
processing is necessary to exercise powers of supervision and monitoring, to conduct audits or organizational analyses of the controller; this shall also apply to processing for training and examination purposes by the controller, as long as it does not conflict with the legitimate interests of the data subject.