Article 4 F1

The documentation referred to in Article 3 shall be kept by the operators for a period of three years from the end of the calendar year in which the operation took place. The documentation shall be organised in such a way, electronically or in paper form, that it is readily available for inspection by the competent authorities upon request. The documentation may be provided via image medium or other data medium, provided that the data, when made readable, match the documentation in appearance and content, are available at all times, can be made readable without delay and can be analysed by automated means.