What do you mean by 'the right to substitute properties'?

Most of the resorts in the Yasawa and Mamanuca Islands are quite small and capacity is limited. Where we specify particular resorts, chances are, you will stay at that resort. BUT ... on occasion, they may be full for the dates that you want to stay there.

The replacement resort that we offer you, will be of a similar standard to the original and you'll have just as good a time. Occasionally we may even have to swap the order of the nights around or put you on a different island but in all cases we’ll provide you with a similar experience.