you want points that are valid for a stay in july 2012.
june UY pts from 2011 would work, since they could be banked into 2012. june UY pts from 2012 would also work.
aug UY pts from 2011 would work, since july 2012 is in the 2011 UY for that UY month (not ideal since you would be traveling at the end of the UY, in case you needed to cancel, but it would work). aug UY pts from 2012 would NOT work since they could not be borrowed into 2011.
in the same way, dec 2011 pts would work and dec 2012 pts would not.
transferred pts will maintain their home resort and UY month.