I got an AC in a promotion on II for buying a Getaway week back in March. The AC is very limited in what it can see as far as resorts go and can only be used within 3 months of check in date. I really thought this AC would be able to see a lot more during the flexchange period but it is extremely limited, which is disappointing. It expires on March 12, 2010. Does this mean that the check in date of the week I use it for has to be on or before March 12 or can I use it for a check in date after March 12 as long as I do the exchange before March 12?