You can reschedule your tour in case of any emergency. In that case no cancellation charges will be deducted. This reschedule offer is valid for one year from the primary travel date.
But, keep in mind that your room tariff may change due to change of the travel date. You will not get any option to reschedule if you inform within 7 days of the start of the tour. And once rescheduled you can’t cancel or reschedule the trip in any way.