In the event of a seat becoming vacant due to the permanent inability of its holder or the loss by a member of the capacity in respect of which he has been appointed, a new member shall be appointed in accordance with the conditions laid down in article R. 5322-1 or the Chairman shall be appointed in accordance with the conditions laid down in article L. 5322-1. The term of office of this member or of the chairman thus appointed expires at the same time as that of the other members of the Board of Directors, with the exception of those mentioned in 2° of article R. 5322-1. In the same circumstances, the staff representatives are replaced under the conditions laid down in the internal regulations.