If a team nominates 22 players, it must have at least six players who can play in the front row in order that there is replacement cover for the loose head prop, hooker and tight head prop.
A player who has been substituted may replace an injured player.
Each half of an Under 19 match lasts 35 minutes playing time. Play in a match lasts no longer than 70 minutes. After a total of 70 minutes playing time, the referee must not allow extra time to be played in the case of a drawn match in a knock-out competition.
In an 8 person scrum the formation must be 3-4-1, with the single player (normally the Number 8) shoving on the 2 locks. The locks must pack with their heads on either side of the hooker.
Even allowing for this exception, each team must always have at least five players in a scrum.
If a team is incomplete and it cannot field eight suitably trained players in its scrum, the scrum formation must be as follows:
If a team is without one forward player, then both teams must use a 3-4 formation (i.e. no No.8).
If a team is without two forward players, then both teams must use a 3-2-1 formation (i.e. no flankers).
If a team is without three forward players, then both teams must use a 3-2 formation (i.e. only front rows and locks).
When a normal scrum takes place, the players in the three front row positions and the two lock positions must have been suitably trained for these positions.
If a team cannot field such suitably trained players because:
either they are not available, or
a player in one of those five positions is injured or
has been sent off for Foul Play and no suitably trained replacement is available, then the referee must order uncontested scrums.
In an uncontested scrum, the teams do not compete for the ball. The team putting in the ball must win it. Neither team is allowed to push the other team away from the mark.
Sanction: Free Kick
Sanction: Free Kick
Sanction: Penalty kick
If a wheel reaches 45 degrees, the referee must stop play. If the wheel is unintentional, the referee orders another scrum at the place where the scrum is stopped. The same team throws in the ball.