Walter Montego:
Section 5, Paragraph 1. Letter e:
The controller shall be obliged to preserve personal data only for a period of time that is necessary for the purpose of their processing. After expiry of this period, personal data may be preserved only for statistical, scientific and archival purposes. When using personal data for these purposes, it is necessary to respect the right to protection of private and personal life of the data subject from unauthorised interference.

Section 5, Paragraph 4:
Without the consent of the data subject, the personal data may be preserved for statistical or scientific purposes. When using personal data for these purposes, it is necessary to make personal data anonymous as soon as possible. However, it is necessary to provide the required level of security according to Paragraph 13.