कोशी का प्रवेश द्वार — मानसी जं० - Prabhat Sharan

The above circular has been issued as clarification of this original rule:
637. Permission to entrain from stations other than those from which accommodation is reserved.Passengers who have purchased tickets and reserved accommodation thereon from a particular station but desire to entrain and occupy the accommodation from another station en route may be permitted to do so provided'
(i) a specific request is made in writing to the station from which the ticket was purchased and reservation made, at least 24 hours before the scheduled departure of the train from that station;
(ii)...
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the train is booked to stop at the station at which the passenger desires to entrain;
(iii) there is no objection to the accommodation being used, if necessary, from the initial station upto the station at which the passenger is due to entrain; and
(iv) no refund is claimed for the portion of the journey not performed.
The change of station once made will be final.

thanks sir, you meant 24hrs before the departure of train from ...
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boarding point(new)