I am seeing Kalka mail running almost always more than 3 hours late between Mughalsarai and Allahabad in both the directions. Now if somebody has reserved a ticket from DLI to KLK, can he file TDR when he sees that the train is running more than 3 hours at say Kanpur even before the scheduled departure from DLI which is at 9.25 pm since the chart would have been prepared?