Yes, the new rule came in effect from 1/04/2014 only. As per it, clearence of WL using the various left over quotas ( like HO, Defence, Handicapped etc.) will be done for GNWL instead of CKWL. Thus you have to totally rely on a total of 37 CKWL ticket cancellations for clearance of your ticket, which looks highly improbable...