I see they are transitioning to a 2 yr exam credit validity now for ATPLs. I couldn't get them all done in 3!
Note: A candidate who has completed some subject-parts, but does not have a full theory credit or a complete ‘bundle’ on 3 December 2013, will find that any subject-parts passed on or before 4 December 2011 will have expired, as the three-year window changes to a two-year rolling window on 4 December 2013.