One thing I'm not certain of, as there are so few opportunities to really test it, is whether the same applies for unused swaps.

I have before now had a 30 day reservation taken out on a block of funds, which the trader then proceeded to trade very very slowly into a position - like, $3 at a time, and each time they broke off another $3 piece to convert into a 'used' swap, the time remaining counter on the unused remainder seemed to reset back to "about 1 month" or, shortly later, "30 days", even while the remaining time on the active swaps (the funds for which had originally been the same block) ticked down to 29 or 28 days.

They returned the whole lot long before it became relevant, but it left me with the impression of a loophole around unused swaps.