Section 245BB of Income Tax Act "Vice-Chairman to act as Chairman or to discharge his functions in certain circumstances"
245BB. (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.
(2) When the Chairman is unable to discharge his functions
owing to absence, illness or any other cause, 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
discharge the functions of the Chairman until the date on
which the Chairman resumes his duties.
245BC. On the application of the assessee or the Principal Chief Commissioner or Chief Commissioner or Principal Commissioner or Commissioner and after notice to them, and after hearing such of them as he may desire to be heard, or on his own motion without such notice, the Chairman may transfer any case pending before one Bench, for disposal, to another Bench.