In the event of a vacancy arising from the permanent inability of the incumbent to perform his duties or the loss by a member of the capacity in which he was appointed, a new member shall be appointed in accordance with the conditions laid down in Article R. 1313-5 or the Chairman shall be appointed in accordance with the conditions laid down in Article L. 1313-4. 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. In the same circumstances, the staff representatives are replaced under the conditions laid down in the internal regulations.