If possible, yes, the moderator/reader/presenter
should stand, but it is not necessary to do so for
College Bowl. I recall many days when Gordon Carper read
while seated during Regionals.
But given the way
the rooms were set up for Region 7, there was a
lecturn for the reader so he had to stand. A table was
set up for the judge and scorer/timer. I think the
setup was based on the recommendations in "the Guide"
for College Bowl (coaches and RC's books). So while
it is not explicitly stated the reader must stand,
the schematics in the books suggest the reader
stands.
/// etc.