Section 68 in The Delhi Metro Airport Express Line, General Rules, 2010
68. Emergency track work or track side work in traffic hours.
(1)No routine maintenance shall be undertaken during the hours in which train services normally run except as provided for in sub-rule (2).(2)If emergency repair work is required to be carried out to prevent accidents or to maintain or restore train services, such emergency work shall be done under the Engineer's Possession which shall be granted by the Traffic Controller without delay taking the exigencies of trains services into account and making adjustments in train schedules.
