Originally Posted by
fumje
I've not heard of that being possible, but if it is the case, it would make sense that you can't apply MUA since you already have a waitlist request on that segment.
And if so, I'd assume the coding for that would list higher than if an instrument were applied. In that scenario listing an instrument would be counterproductive.
Additionally, if OP is a Plat (per profile), the B fare would give access to PZ.