The ARU has put together a very informative information page on Concussion.
Go to http://www.rugby.com.au/tryrugby/Administration/ConcussionGuidelines.aspx for the up to date information.
Using this link you will be able to access the pocket Concussion Recognition Tool, Concussion Guidelines, along with the resources listed. Please ensure that you download the Pocket Concussion Recognition Tool.
It must be noted by all that any Junior player (ie under 18s years of age) who suffers concussion is unable to return to contact training or matches until a minimum of 14 days has elapsed since they were symptom free. A Dr MUST clear a child to play or training before they will be permitted to resume.