Section 218(2) in The Dedicated Freight Corridor Railway General Rules, 2018
(2)The Station Master on duty proposing single line working and the Station Master on duty at the other end of the affected section shall exchange messages in form 13 containing the following information under exchange of Private Numbers namely-(a)cause of introduction of single line working;(b)the line by which the single line working is proposed;(c)place of obstruction on the line which is obstructed;(d)names of intermediate stations, if any, which shall be out of use;(e)the number and the timings of the last train, which arrived or left the block station issuing the message; and(f)whether he proposes to run trains one by one as in absolute block system on authority to proceed in terms of form 2, or trains shall be following each other even though the earlier train has not cleared the entire Block section in terms of form 15 for which permission of Director, operation and business development has been obtained.