1. The language of proceedings before the Court of Appeal shall be the language of proceedings before the Court of First Instance.
2. Notwithstanding paragraph 1 the parties may agree on the use of the language in which the patent was granted as the language of proceedings.
3. In exceptional cases and to the extent deemed appropriate, the Court of Appeal may decide on another official language of a Contracting Member State as the language of proceedings for the whole or part of the proceedings, subject to agreement by the parties.