J Dhulia: does the Rules say that the Election Commission has to conduct the intensive revision periodically or when? Do they have to do it or is it up to them?

Sankarnarayanan: section 14 gives the qualification date either 1st January, 1st April, or 1st July, or October of the year in which it is revised. So if they decide to do a revision they have to set one of those dates as qualifying dates.