If the ticket is presented for cancellation within four hours before the scheduled departure of the train and up to -
(i) Three hours, when the ticket is for a destination station up to 200 KM.
(ii) Six hours, when the ticket is for a destination station of more than 200 KM...
more... but up to 500 KM., and
(iii) Twelve hours , when the ticket is for a destination station of more than 500 KM.,
after the actual departure of the train, cancellation charges shall be 50 % of the fare.