Section 50(7)(b) in The Delhi Metro Airport Express Line, General Rules, 2010
(b)the Traffic Controller shall inform the station controller at the station designated to receive the passengers and the station controller shall clear the platform concerned of waiting passengers and, if necessary, stop incoming passengers, and if a tunnel section is involved, he shall switch on tunnel lighting, open all emergency doors, manual secondary doors and platform screen doors and he shall position himself and his security staff on the platform to receive the arriving passengers;