viceroys are allowed as long as they are not required to have admin access, iirc.
also viceroys r bad mkay. ask GATO about it.
just make them a large tech farm for a couple of months and either sentece peace moders to ZI or force them to give up most of their tech.
edit:
CK was an idiot, but assuming there's going to be a viceroy, then Wally, hell yeah!