this may seem like the stupidest of questions, but i've always wondered why ITN (or other fare basis viewing engines) can still show H,Q,V,L fares even when you don't meet the departure date minimums anymore? (i.e. pull up any old AC flight for departure tomorrow... chances are, it'll still show something like this - J2 C0 Y9 M9 T1 B9 H9 V9 Q9 L9 N1). I can't purchase an L fare, but it still shows "availability".

Although it's probably either a system or a system integration issue, doesn't it make sense that when you are 24 hrs away from departure, the L inventory should be zeroed out the way Empress sees his C inventory disappear?

(sorry Empress, bad joke! Hope you get the u/g on the return!)