Considering CEE doesn't require a "loading" phase (unlike creatine-mono), I guess this would imply that it is not necessary to take CEE during off days. However, it seems like every time this question gets asked, everyone advises to "continue taking CEE during off days."
I was able to only find 1 person who said that a half-dose is sufficient for the "off" days, but like I mentioned earlier, everyone else says to continue taking the full dose.
However, if that's a picture of you next to your screen name, then here's my response: Do whatever you've already been doin, 'cause you look fuckin YOKED! Keep it up, brutha!