If they allow before 1030 they have to leave the train in PF. Korba exp has SM from 730 to 1230/1300 and has to leave at 1400 The same pitline may be allowed to Tirumala for PM up to 2000 ti leave as korba exp at 2100 which may be occupied by JB. To advance arrival they need a slot in pitline and rearrange schedules occupancy.