The allotment of berth in an alternate train would be available within 12 hours from the scheduled departure of the original train.
Passengers who opt for the scheme at the time of reservation would be considered for allotment of berth in the alternate train should their status remain waitlisted after the final chart is prepared.
Railways has, however, made it clear that opting for the scheme would not ensure confirmed berth in the alternate train. "It is subject to train and berth availability," it said.
"Based on the feedback, the scheme may be provided through the counters and also on other sectors," a Railway statement said.
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"No extra charges shall be taken from passenger or any refund shall be provided for difference of fare," it added.
The allotment of berth would be informed through SMS and can be checked from the enquiry counters or by dialing 139.
According to the statement, either all passengers of a PNR or none will be transferred to alternate train in same class.
Railway officials said the initiatives are aimed to provide confirmed accommodation to waitlisted passengers and also to ensure optimal utilisation of available accommodation.