Section 7(2)(b) in The Railway (Notices of and Inquiries Into Accidents) Rules, 1998
(b)cases involving persons being railway servants or holding valid passes/tickets or otherwise who are killed or grievously injured while travelling outside the rolling-stock of a passenger train such as on footboard or roof or buffer but excluding the inside of vestibules between coaches, or run over at a level crossing or elsewhere on the Railway track by a passenger train, and