Presently. when someone gets banned -not fully, but only with the 'cannot post' restriction- he still can post classifieds!
This is a problem... For example, in my case, a member is accused of fraud and I wanted to send him a PM requesting explanations while prohibiting him from posting new classifieds. I ended up banning him fully, with no questions asked.
The 'no new classifieds' and 'no comments in classifieds' restrictions should take place automatically along with the 'cannot post', during the warning level increase also.