21.   (1)   The office of the Chairman or any member of the Appeal Tribunal shall be vacated if -----

                 (a)   he dies;

                 (b)   he resigns or otherwise vacates his office before the expiry of 
                         the term for which he is appointed; or

                 (c)   his appointment is terminated.

         (2)   The Minister shall appoint a person accordance with section 17 to replace the Chairman or any other member during the vacancy in the office of the Chairman or any other member.

         (3)   The Minister shall appoint a person in accordance with section 17 to act as the Chairman, or any other member ----

                (a)   during any period when the Chairman or any other member is 
                        absent from any duty or from Malaysia; or

                (b)   if the Chairman or any other member is, for any reason, unable 
                        to perform the duties of the office.

         (4)   The exercise of the powers, or the performance of the functions, of the Appeal Tribunal is not affected only because of there being a vacancy in the membership of the Tribunal.

22.   The quorum for the Appeal Tribunal shall be formed by -----

                 (a)   a Judge; and

                 (b)   at least two members, or any greater even number of members 
                         not exceeding four, none of whom are Judges,

for the purposes of the functions of the Appeal Tribunal under this Act.     

Quorum for the Appeal Tribunal.