Originally Posted by jagmeets

Nope- if CX has a published 'V' or higher applicable fare, you get to book any, as low as V/published, irrespective of any/all fare buckets being zero'd or closed.

(Some destinations have the lowest fare class as higher than 'V'- like HKG-MNL had L or M a few years back).

Came in handy a few times, and absolutely fabulous value when it's used. (Usually, meant higher chances of an op-up, under the old regime).