Ideally this wouldn't happen, but the need for subs is too great and I would prefer the position be subbed. I have done this before, and as long as the sub is honorable it shouldn't be an issue.
hmm its not just for me to decide but i do think thats kind of a nono :P
Given that you are at war with Marverni, I would think you'd get a veto, but do you think it would make much difference that Baalz had sub'd for Lanka earlier?