Administrative Tribunals Act, 1985
7. Vice-Chairman to Act as Chairman or to Discharge his Functions in Certain Circumstances. –
(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-Chairmen or, as the case may be, such one of the Vice-Chairmen as the appropriate Government may, by notification, authorize 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.