Additional confirmation of impending policy change (no longer "rumor"):
In the future, this will be true. However, because terms and conditions for diamond members could not be updated in time, for 2016 you will be able to use 2015 DSU's in 2016. Internally there is a process we have to go through to issue the award. The same rules apply, that if you cancel the future reservation after 2/29/2016, you will loose the 2015 DSU award.