The most updated Laws of Rugby, regulations, and law clarifications should be obtained from the iRB website at http://www.irb.com/lawregulations/index.html 

You can find the 2012 Laws in the attached file.

Below is a breif outline of the Pathway laws specific to the U6 - U12 age groups. These are variations to the standard laws to simplify the game and increase the safety element.

Each year the ARU publish a document for all levels of the game, which outlines how they wish the referee to manage the game, and specifically how each phase of the game from open play, the breakdown and set pieces should be managed and the the laws applied. This is an useful document for coaches that will assist them to understanding how referees will apply the laws to specific areas of the game.