The IFAB Laws of the Game are the primary resource for the game of soccer.
FIFA has produced a list of considerations (updated Sep 2017) to be used by referees to help making decisions during play.
The IFAB Laws of the Game may differ from local district/youth club tournament rules.
In Ontario, Ontario Soccer has produced guidelines for small sided soccer (7v7 and 9v9):
For more information on the retreat line complete with diagrams please take a look at the Field Organization Guide from the OSA.
Ontario Soccer has published indoor rules:
A short brochure to help with report writing was prepared within the district.