[GundamFan0083]

Spoiler for reply:

Enoch and Euhpie do not know the details of the ZR.
It's not important to them because it failed miserably due to the unforseen involvement of the Greeks; also Enoch has a different agenda than everybody else in this fanfiction.

Everyone else (that were directly involved with the events of R2; Tohdoh, Xingke, Cornelia, Schneizel, Kallen, C.C., and of course Nunnally and Suzaku) all understand the ZR but have differing opinions about it. Cornelia, for example, thinks she's figured out what Lelouch was trying to do and thus she's trying to fulfill his plan independent of him; Tohdoh is the same way.
Nunnally has chosen to scrap the ZR idea completely and formulate her own plan.

Damn it I forgot to explain that part (the permanent Geass activation changes I wanted to make).
Thanks for reminding me.
I'll have to make a note of it and add something about that in the next five chapters.
Once you have a Code you can completely control your Geass.
I garnered that from Charles' ability to control his double Geass when he used it against Lelouch (while Suzaku held him down) at the begining of R2 during the flashback Lelouch had while reading the Britannian Special Intelligence commander's diary.