Section 51(15) in The Delhi Metro Airport Express Line, General Rules, 2010
(15)In case of depot being in the direction opposite to the direction of working of the divided train, the rear portion of the divided train shall first be worked toward the nearest station in the direction of depot after positioning a security staff at the divided train portion in the rear, after the train operator has changed his cab in the leading direction of movement, in consultation with the Traffic Controller.
