vote of three-fifths of the 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 subsection (a)(1). . (b) Conforming amendment The table of contents set forth in section 1(b) of the Congressional Budget and Impoundment Control Act of 1974 is amended by inserting after section 315 the following: Sec. 316. Debt limit increase point of order. Sec. 317. Debt limit suspension point of order. .