[Provided further that at any stage of the hearing of any such case or matter, referred to in the first proviso, the Chairman may, if he thinks that the case or matter is of such a nature that it ought to be heard by a Bench consisting of three Members, constitute such Bench and if Vice-Chairman is not one of the Members, the senior among the Members shall act as the presiding officer of such Bench.]

(7)

Notwithstanding anything contained in the foregoing provisions of this section, the Chairman may, for the disposal of any particular case, constitute a special Bench consisting of more than three Members.

(8)

Subject to the other provisions of this Chapter, the special Bench shall sit at a place to be fixed by the Chairman.