5/20/2011 6:00:59 PM
This is challenging stuff you are working on!
My understanding is that if your primary code is Nemeth, then you would indicate where you are where you begin and end Computer Braille Code. Since you have indicated the end of Computer Braille Code, the logical assumption is that you have returned to the primary code, and there is therefore no need to use the begin and end Nemeth Code indicators. I think that pg 39 of the Computer Braille Code Revised 2000, is referring to when the primary code is English Braille.
Hope this helps,