Only maximum 15 mins required for LC. But if train is reaching NDLS 15 mins before at say 6.55 pm or 7 pm and departure from NDLS at 7.40 pm then for 40 mins ,1 train cannot block a platform at NDLS and for that contrlling will be done at NWR, NR region and 1 or 2 more halts will be added so that train reaches NDLS at 7.20 pm to 7.25 pm. 1 halt after inauguration already added , 1 or 2 more can be added in future