<Dl> <Dd> Each team may make a maximum of 12 interchanges from the 13 starting players and four substitutes . A player sent from the field by the referee because they are bleeding may be replaced but should this happen the replacement will count as one of that team's allotted interchanges . Props are the most commonly interchanged players due to their frequent physical confrontations with opponents . The number of interchanges allowed may differ in local competitions . </Dd> </Dl> <Dd> Each team may make a maximum of 12 interchanges from the 13 starting players and four substitutes . A player sent from the field by the referee because they are bleeding may be replaced but should this happen the replacement will count as one of that team's allotted interchanges . Props are the most commonly interchanged players due to their frequent physical confrontations with opponents . The number of interchanges allowed may differ in local competitions . </Dd> <Dl> <Dt> Kick - in (obsolete) </Dt> <Dd> <Dl> <Dd> See: Punt - out </Dd> </Dl> </Dd> <Dt> Kick - off </Dt> <Dd> <Dl> <Dd> A coin is tossed and the winning captain either chooses which direction his team shall play, or elects to take the kick that starts the game . Both halves of the match are started with a kick off a tee from the centre - point of the halfway line . The kick must cross the opposition's 10 - metre line, unless played by a member of the receiving team . The opposition are not allowed to encroach beyond the 10 - metre line until the ball is kicked . </Dd> <Dd> If the ball does not travel 10 metres, goes straight into touch, or goes over the dead ball line at the end of the pitch, the opposing will be given a penalty at the centre . </Dd> <Dd> After a score, the game is restarted from the same place under the same restrictions, with the conceding team drop - kicking the ball to the scoring team . </Dd> </Dl> </Dd> <Dt> Knock - on </Dt> <Dd> <Dl> <Dd> It is also called a knock - forward . A knock - on is committed when, in an attempt to play at the ball, a player knocks the ball towards their opponents' dead ball line with their hands or arms and it touches either the ground, or an opposing player . However, the ball may be knocked back . A knock - on results in a scrum with the put - in to the opposition apart from when a knock - on is committed by a player whose team is on their last tackle, when the result is a handover, and apart from if the opposing team gains possession of the ball, which results begins their set of tackles with a zero tackle . </Dd> </Dl> </Dd> </Dl> <Dt> Kick - in (obsolete) </Dt>

What does hia stand for in rugby league