DO NOT get penalties. They are more often bad for your Side.
The often result in Scrums and will make the Pack want to Scrum you after the Match.
On Penalties the Sir holds one hand straight up and points the other at the Side that will get control of the Ball.
Knock-on is when the ball touches any part of your body and bounces away.
The exception is if it hits below the knee. Then it is considered a kick and is fair.
Forward Pass is when you pass the ball to a team mate who is in Front, or even beside you.
ONLY pass to a team mate who is BEHIND you.
Off-Sides is when you engage the ball or a defender from the wrong side of the ball.
Stay behind your man with the ball.
Stay in front of a defender if he has the ball.
Obstruction is basically when you get in the way of an opposing player that does not have the ball.
This results in a penalty, so stay BEHIND your team mate who has the ball.
When a penalty is against your side - Immediately get back 10 meters.
Otherwise you are off-sides and MAY NOT tackle the ball carrier without earning another penalty.
When the penalty is against the other Side, get into position behind your player who re-starts play.
Advantage is when the Sir decides your infraction actually benefits the other Side.
So, the Sir can allow play to continue as long as he feels the other Side is benefiting.
But, if the other Side does actually not benefit, the Sir will call the ball back to where you earned a penalty.