This statement may be true, but recent evidence demonstrates that DVD exercises some flexibility in this regard. A review of condo records and deeds for Bay Lake Tower at the Orange County Comptroller's website shows that BLT's Unit 89a was not declared by DVD for the DVC until July 15, 2009 and not recorded at the OCC website until July 20, 2009. However, on July 27, 2009, at least two deeds were recorded at OCC for Unit 89a. On both of them, the buyers signed the deed before July 15 -- one buyer signed on July 1, the other on July 2. DVD did not sign off on the deed until July 21.
I guess until DVD signs off on a buyer's contract, then they haven't really "sold" those points. But the OCC records show that it can offer points to buyers in undeclared units and then declare the units afterward.
There is an interesting thread that is tracking the declarations made by DVD on BLT. See
http://www.disboards.com/showthread.php?t=2212548
http://www.disboards.com/showthread.php?t=2212548