1. Regulation (EC) No 1049/2001 of the European Parliament and of the Council (26) shall apply to documents held by ACER.
2. The Administrative Board shall adopt practical measures for applying Regulation (EC) No 1049/2001.
3. Decisions taken by ACER pursuant to Article 8 of Regulation (EC) No 1049/2001 may be the subject of a complaint to the Ombudsman or of proceedings before the Court of Justice, in accordance with the conditions laid down in Articles 228 and 263 TFEU.
4. The processing of personal data by ACER shall be subject to the Regulation (EU) 2018/1725 of the European Parliament and of the Council (27). The Administrative Board shall establish measures for the application of Regulation (EU) 2018/1725 by ACER, including measures concerning the appointment of ACER's Data Protection Officer. Those measures shall be established after consulting the European Data Protection Supervisor.
5. ACER may engage in communication activities on its own initiative within its field of competence. The allocation of resources to communication activities shall not be detrimental to the effective exercise of the tasks referred to in Article 3 to 13. Communication activities shall be carried out in accordance with relevant communication and dissemination plans adopted by the Administrative Board.