This status as the active or legal wrestler may be transferred by physical contact, most commonly a palm-to-palm tag which resembles a high five.
The team-based match has been a mainstay of professional wrestling since the mid-twentieth century, and most promotions have sanctioned a championship division for tag teams.
However, during the 1970s and 1980s, a dominant trio in the NWA known as The Fabulous Freebirds won several regional tag team championships and were allowed to employ any combination of the group's members in their title defenses.
However, only one wrestler from each team, called the "legal man" is allowed in the ring at a time (although heels will often flout this rule in an attempt to gang up on a single opponent).
In some multi-man tag matches in lucha libre, a wrestler can make himself the team's legal man simply by setting foot in the ring, and his partner then leaves.
One member of one team is in the ring, too weakened to move or otherwise impaired, while his partner watches helplessly, struggling to reach him for a tag.
Eventually the weakened face wrestler does make the tag to his partner, who comes in as the fresh man and is able to take on both opponents quite easily.
Bookends are common in North America, Europe and Mexico[citation needed], but not in Japan as the promotion of wrestlers to singles championships in that country is based in part on their work in tag team matches.