18(1)The Chairman may select a member of the Competition Commission to replace another as a member of a group with the function of determining an appeal if—
(a)the person being replaced has ceased to be a member of the Commission,
(b)the Chairman is satisfied that the person being replaced will be unable, for a substantial period, to perform the duties of a member of the group, or
(c)the Chairman is satisfied that, because of a particular interest of the person being replaced, it is inappropriate for that person to remain a member of the group.
(2)The Chairman may select himself or herself to replace a member of the group.
(3)The replacement of a member of the group does not—
(a)prevent the group from continuing with anything begun before the member is replaced, or
(b)affect any decision made, or direction given, by the group before the member is replaced.