BCCI is beginning to work on this year's IPL, irrespective of when or not the statement from the ICC arrives on the T20 World Cup. A tentative window is being drawn up, as reported by TOI earlier, and the BCCI will not wait anymore to hear from the ICC.

from Times of India https://timesofindia.indiatimes.com/sports/cricket/ipl/top-stories/fed-up-with-icc-for-delaying-t20-world-cup-decision-bcci-says-ipl-preparations-cant-wait-anymore/articleshow/76805408.cms