Wallabies head coach Michael Cheika is being investigated for his "comments and conduct" during their Test match against England at the weekend.
World Rugby, the game's governing body, has referred the case to the internationals disciplinary authorities, who are investigating.
Michael Cheika Photo: Photosport
Cheika reacted angrily to a series of decisions that went against his side in the 30-6 defeat at Twickenham.
After the game Cheika was furious about accusations he called New Zealand referee Ben O'Keeffe a cheat.
He was also was involved in an exchange with a supporter just before half-time.
In a post-match interview with the BBC, Cheika was reluctant to be drawn on the role of the officials, saying Australian rugby operates a "no-excuses culture".
The Wallabies lost their captain Michael Hooper and full-back Kurtley Beale to first-half yellow cards and had two tries of their own disallowed as a series of marginal calls went against them.
