The members of the Enlarged Board of Appeal and of the Boards of Appeal shall be appointed for a term of five years and may not be removed from office during this term, except if there are serious grounds for such removal and if the Administrative Council, on a proposal from the Enlarged Board of Appeal, takes a decision to this effect. Notwithstanding sentence 1, the term of office of members of the Boards shall end if they resign or are retired in accordance with the Service Regulations for permanent employees of the European Patent Office.