None after the trading deadline. Must be an equal, reasonable trade and will be approved by 2 of 3 Trade Moderators. Without at least 2 approvals, the trade will not be input and must be reworked or abandoned.
In the event that one (or two) Trade Moderators are involved in the trade, the league commissioner can weigh in with approval or veto.
Draft Picks for the current season, and NEXT season, may be traded. However no accumulating team can accumulate more than 2 first round or 2 second round draftees for any single year.
Free Agents just signed in the previous offseason cannot be traded until Jun 1st.