|Around the Academy:
The offside rule in GAA is relatively straight forward - as long as the interfering with play clause isn't included.
Attacking players cannot enter the small rectangle before the ball, if they do, an offence has been committed.
It isn't quite as clear cut as it might sound because there are exceptions.
A player may already be inside the small rectangle and not be offside, as long as:
The ball is played out of the small rectangle and back in before the player has been able to leave the area and as long as he doesn't play the ball or impede the opposition.
This is included in the technical fouls of the game.