Didn't I mention it in your last post that member ranks can vote?
Yeah, there is an inconsistency between the local rules and thread description. Member ranks can create new topics and reply in serious discussion but not in Ivory Tower. However, in Ivory Tower, member ranks can make a vote in polls, read, watch and get notified of posts.
Regardless, I too think that it's not normal when a member rank is not allowed to make a post.
I remember now you said that, but I didn't have that in mind when I created the thread... However, doesn't seem consistent to be able to vote, but not to post. Besides, in the section's description and in theymos' thread with rules for IT isn't stated that voting is possible for ranks below Full Member.