The comprehensive plan, prepared by the CPCB, focussing on Delhi was submitted to the Supreme Court on December 2. The court had accepted the plan and asked the Centre to notify it. Once the plan is notified, measures like odd-even car rationing scheme and ban on construction activities will be enforced if level of PM 2.5 breaches 300 micrograms per cubic metre and PM 10 levels stay above 500 micrograms per cubic metre for two consecutive days.