If you have traded a pick at least half an hour before the pick is scheduled to be up (not half an hour before it expires), and the Trade Council has not finished voting, the vote that the trade is at at the point of when the pick is up is the final decision. So if it's 1-0 or 2-1, and the pick is up, it is approved. If it's a tie (has to be at least 1-1), then it is also approved.