As long as the pass is from this year. we usually dole out passes dated last day of the current anniversary year, then they are valid for one year within the anniversary. I have a nephew who is currently in Chile on a pass from last year's allotment. He MUST return before the DOH anniversary 2012. His ticket is valid thru 7/09/2012. After that, he can't use the pass.
We still have ALL of this year's BPs available to dole out on 7/09/2012 to use for an full year. The only trick is that they can't be reissued to diff buddies . But we stil retain all 8 passes as needed for the next year.