56 Communications providers may process traffic data for the purposes of technical development of transmitting communications or communications services. Prior to the start of the processing referred to in subsection 1, subscribers or users shall be informed of what traffic data are to be processed and how long the processing will last. The information can be given only once. Section 142 Processing for the purposes of statistical analysis For the purposes of statistical analysis, automatic data processing may be used by a communications provider for processing traffic data if: 1) the analysis cannot be made by any other means without undue difficulty; and 2) no individual natural person can be identified in the analysis. Provisions of subsection 1 shall also apply to a subscribing legal person’s right to process the traffic data related to its subscription and terminal device. Section 143 Right to process data in cases of misuse A communications provider may process traffic data for detecting, preventing or investigating any non-paying use of fee-based services or similar cases of misuse. Ficora may issue further regulations on the technical implementation of the processing of traffic data referred to in subsection 1. Section 144 Processing for the purpose of detecting a technical fault or error A communications provider may process traffic data if this is necessary for the purpose of detecting, preventing or investigating a technical fault or error in the transmission of communications. Section 145 Saving information on data processing A communications provider shall save further event log information on any processing of traffic data relevant to confidentiality and privacy security, if this is technically feasible and does not cause unreasonable additional costs. This event information must show the time and duration of the processing and the person performing the processing. The event information shall be stored for two years from the date on which it was saved. Ficora may issue further regulations on the technical implementation of the saving and storing referred to in subsection 1. Chapter 18 Special Provisions for Corporate or Association Subscribers