At the risk of going over old territory, have re-read our discussion I think we've basically been talking at cross purposes all the way through here with regards to the meaning of a control zone.  When I use the term control zone in all of the above, I use it as per the Wikipedia definition in the Control Zone article, which is correct as per ICAO.  I thought that this was apparent from my use of the wikilink above, but apparently it was not.