What does rolling tier qualification mean?

Regardless of whether you drop a tier, keep your tier or move up a tier in your review, we don’t wait another year to reassess your Tier Miles balance, but instead we check it every month. That way, we keep giving you the chance to qualify or move up a tier by ‘rolling over’ your tier qualification period. So, at the end of each month we count up your Tier Miles or qualifying flights over the previous 12 months to reassess your status. This rolling assessment gives you 12 opportunities during every year to move up a tier, instead of just one.