[4] No flying, speedhacking, or glitching, or using any hack that gives you an advantage everyone else doesn't have. NoCheat is installed, so most mods will not work, and will send a notification to Admins and Moderators that you are violating regular movement rules. You will be warned, then jailed or banned for these violations, with extended duration each time they occur. Hacking out of jail will get you BANNED.
The rule stats that it's against the rules to use a hack to give you an advantage above other players. Not that it's against the rules to have the hack.
After a huge off topic discussion with Oddy, the conclusion came that there is an unwritten rule to not allowed to have Nodus, or a hack client. Cause of the possibility of breaking the rule is greater then those that don't have a hack client, or those that just haven't been caught.
I say you have a good case, if they can't prove you used the client to get an advantage above other players.
Nodus does have a NoRender feature, and other features that make video recording easier. (fullbright, nametag block, Norender, etc)