OK. Would a goal be given in the same circumstances? Or a 40/20? Or a penalty kick for touch?
It has to land, I thought. Can anyone cut and paste the rule?
A goal would be given. A 40/20 or penalty kick from touch would also, however in this case the ball does have to be contacted by something that is itself in touch, such as the ground or a player.
That said, if the ball somehow (and I acknowledge this is an extreme and probably physically impossible example, but bear with me) crossed the touch line over the 20 (between the 20 and 10 metre lines), and was then blown back infield, then crossed the touch line again behind the 20 (so between the 20 and 30 metre lines) all without touching the ground first, a 40/20 would still be given as the point where it first crossed the touch line is where it is considered to have gone out.
As for a kick off, the only stipulations are that it must travel 10 metres in a forward direction, and must not land in touch on the full. Once it has travelled 10 metres in a forward direction, it doesn't matter where it goes.
I'll fish out the relevant rules.