Singhvi: imagine the harm we are causing to settled scheme- opening words of A.200 are short-either he assents, withholds assent therefrom and reserves.

Middle word is or that he withholds- Constitution chooses not to be silent as to what happens when you withhold assent that proviso must follow.

CJI: otherwise the word as soon as possible will be rendered otiose if you withhold for eternity