with a further amendment, or concur in the House amendment with a further amendment, as the case may be, which further amendment shall consist of only that portion of the conference report or House amendment, as the case may be, not so stricken. Any such motion in the Senate shall be debatable. In any case in which such point of order is sustained against a conference report (or Senate amendment derived from such conference report by operation of this subsection), no further amendment shall be in order. (d) Supermajority waiver and appeal In the Senate, this section may be waived or suspended only by an affirmative vote of three-fifths of the Members, duly chose and sworn. An affirmative vote of three-fifths of Members of the Senate, duly chosen and sworn shall be required to sustain an appeal of the ruling of the Chair on a point of order raised under this section.