Clip 1 - 9 November 2016 - Law 10
Stick it up your jumper.
Australia play the Barbarians in Sydney. The referee penalises Australia for offside. The mark is in front of the Australian posts, some 10 metres from their goal-line. The Barbarians form a huddle. The referee is told they are going to tap the ball. Tim Nanai-Williams, at the head of the huddle, taps the ball. The Barbarians scatter in all directions and sturdy prop Taniela Tupou charges over the line with a protruding jersey, but as he charges the whistle blows. Tupou produces the rugby ball from under his jersey and the players gather around the referee. He explains: "You can't intentionally pout the ball in someone's jersey. It's unsportsmanlike behaviour and I cannot allow that." He awards a scrum to Australia.
It is not specifically written about in the laws of the game, but neither is directing foul language at an opponent, or shinning up a goal post or stabbing the rugby ball or throwing your scrumcap at an opposing kicker as he runs up to kick.
All of that falls under an article ion Law 100, which deals with foul play.
Law 10.4 (m) Acts contrary to good sportsmanship. A player must not do anything that is against the spirit of good sportsmanship in the playing enclosure.
Sanction: Penalty kick
The referee is there to judge if an act is against the spirit of good sportsmanship and decides that it was. In terms of the law he could have penalised the Barbarians. Imagine how that would have incensed the small crowd who were there for rugby fun. There was some booing as it was.