Its against the EULA. They're pretty broad with their coverage of such topics, so they can deem almost anything against the EULA if it hurts the game/company. The EULA can be found in-game under the Options menu.
EULA, Bullet point 4 wrote:It is forbidden to trade or sell Perpetuum accounts, in-game items, characters, money, etc in any way outside the game. In this case both the seller and the buyer can be punished by AC.
In this case, the outside item is the time code, and the in-game item is NIC.
I notice now that this isnt really categorized in any proper section that addresses this issue, but its still there.
->You just lost The Game<-