Section 18 in Railway Passengers (Cancellation Of Ticket And Refund Of Fare) Rules, 1998
18. Wait-listed passengers or concession and privilege ticket order tickets.-
When any person has purchased a ticket on any concessional order or privilege ticket order, and is wait-listed for reservation in any train, he shall be entitled to avail of the same ticket for reservation in any other train on the same date or any other date, without losing the benefit of concessional fare.
