1. Where allowed by Article 8 of Regulation (EC) No 2533/98, confidential statistical information shall be transmitted extra muros electronically, following encryption.
2. The ECB and the NCAs shall each define authorisation rules for such transmission of confidential statistical information.
3. For internal networks, appropriate protection measures shall be taken to prevent unauthorised access.
4. Interactive access to confidential statistical information from unsecured networks shall be prohibited.