On April 1, Disney filed the official documents including the GFV declarations. It is those documents that determine that it actually exists as a timeshare property that can be sold and they cannot sell any use year month that begins before then because legally the timeshare did not actually exist before then. They can sell any months beginning with April 2013. Moreover, Disney's policy for sales to existing members is to sell you points only in your already existing use year and thus you cannot buy April if you have a Feb or March use year (there is no Jan or May use year), but instead you would get points starting in Feb or March 2014. The exception to that is that you can request a new use year if buying the minimum number of points required to be purchased by a new purchaser, but since Disney is not yet selling anything to new purchasers, you are not likely to be able to do that before the June date that has been set for initial sales to new purchasers.