(1)In the event of the occurrence of any vacancy in the office of the Chairman by reason of his death, resignation or otherwise, the Vice-Chairman or, as the case may be, such one of the Vice-Chairmen as the Central Government may, by notification in the Official Gazette, 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 Chapter to fill such vacancy, enters upon his office.