(1) In the event of the occurrence of any vacancy in the office of the Chairman by reason of his death, resignation or otherwise, such one of the Vice-Chairman as the Central Government may, by notification, authorise in this behalf, shall act as the Chairman until the date on which a new Chairman, appointed in accordance with the provisions of this Act to fill such vacancy, enters upon his office.
     (2) When the Chairman is unable to discharge his functions owing to absence, illness or any other cause, such one of the Vice-Chairmen as the Central Government may, by notification, authorise in this behalf,shall discharge the functions of the Chairman until the date on which the Chairman resumes his duties.