This would be a question best for the DarkRP support forums or wiki.
In reference to your question, all ULib does is control groups, and ULX controls permissions of ULX commands.
We do not know what other gamemodes / mods / addons use for their own commands.
ULX remains gamemode agnostic for this reason.
We try not to touch anything for any gamemode other than Sandbox, the default 'out of the box' GMod gamemode.