Substitutes (generally referred to as "the bench") are allowed in the sport, and are typically used when a player gets tired or injured , although they can also be used tactically. Each team is currently allowed four substitutes, and in Australia and New Zealand, these players occupy shirt numbers 14 to 22.  There are no limitations on which players must occupy these interchangeable slots. Generally, twelve interchanges are allowed in any game from each team, although in the National Rugby League, this was reduced to ten prior to the 2008 season  and further reduced to eight prior to the 2016 season. If a team has to interchange a player due to the blood bin rule or due to injury, and this was the result of misconduct from the opposing team, the compromised team does not have to use one of its allocated interchanges to take the player in question off the field.