19.15 OFFSIDE WHEN NOT TAKING PART IN THE LINEOUT

(a) A player who is not taking part in the lineout is offside if that player oversteps the offside line before the lineout has ended.
Sanction: Penalty kick on the offending team’s offside line opposite the place of infringement, at least 15 metres from the touchline.

(b) Players not yet onside when the ball is thrown in. A player may throw in the ball even if a team-mate has not yet reached the offside line. However, if this player is not trying to reach an onside position without delay, this player is offside.
Sanction: Penalty kick on the offending team’s offside line opposite the place of infringement, at least 15 metres from the touchline

(c) Long throw in. If the player who is throwing in throws the ball beyond the 15-metre line, a player of the same team may run forward to take the ball as soon as the ball leaves the hands of the player throwing in. If that player does so, opponents may also run forward. If a player runs forward to take a long throw in, and the ball is not thrown beyond the 15-metre line, this player is offside and must be penalised.
Sanction: Penalty kick on the offending team’s offside line, opposite the place of infringement, at least 15 metres from the touchline

(d) Ruck and maul from a lineout. When a ruck or maul develops in a lineout, the lineout has not ended until all the feet of all the players in the ruck or maul have moved beyond the line of touch.
Until then, the offside line for players not taking part in the lineout is still 10 metres behind the line of touch, or the goal line if that is nearer. A player who oversteps this offside line is offside.
Sanction: Penalty kick on the offside line, at least 15 metres from the touchline