The tag team rules don't differ too much from the standard poker tournament. The main difference is that instead of π one player playing one stack of chips to the end of the competition, players can tag in and out of π the hot seat to play a few betting rounds.
Each player can take as long as they want at the table π - betting as many hands and rounds as they'd like - so long as every player from each team plays π in the tournament at some point. Though this rule may vary between each location.
In the WSOP Tag Team Event, each π player has to play one full "round of blinds" or the team will be disqualified.
Another important rule that is incorporated π in almost every tag team tournament, is that players cannot tag in-and-out during a hand. This means if you start π a hand, you must play the hand through to the end before you can switch out for another member of π the team.
Bottom line: You can only tag-in another team member between hands.