Detailed trading rules along with how trades are administrated can be found here.
Users cannot own multiple accounts. Anyone who joins the same league with multiple accounts will be banned.
Users cannot abuse trades. Trade abuse occurs when two teams make a lopsided trade or use a trade to share a player (the player is used in an important game, salary consumed and then traded back, made into an enforcer and then traded back, or altered or used in some other significant way and traded back). All trades must have a legitimate hockey explanation for both teams!
Users found harmful to the game may be banned at the discretion of the administrators.
Users cannot take advantage of ignorant players, especially new players. Any user caught exploiting another user that lacks playing experience, such as stripping a new team of it's young talent in exchange for veterans or more expensive players will result in the exploiter being banned.
Buying players out, putting players on waivers, or signing an RFA primarily to help another team will result in banning.
Multi-mimicking: Users playing the game like an abusive multi will be banned. For example, making lopsided trades with select teams or playing to lose long-term to help other teams. Any beneficiaries will also be banned if they planned it. Should an unbalanced league be created on purpose, this will be considered planned multi-mimicking.
Medallion Multis: Only one team per user may join the Medallion.
Community conduct: Foul or derogatory language directed towards another user is not allowed. More details can be found here.