Section 29(7) in The Delhi Metro Airport Express Line, General Rules, 2010
(7)(i)Failure of main car lighting on one or two cars shall be reported by the train operator to the Operations Control Centre and the train may continue in passenger service to the end of its trip provided the emergency lighting is working satisfactorily and at the terminal it shall be withdrawn from service or replaced by a good train;(ii)if all main train lightings fail or main lighting and emergency lighting both fail, on the same car, passengers shall be detrained at the next station and the rake withdrawn from service.
