Who can make a complaint or report to the PILS, and is there an age limit?

According to the Québec government's page on filing a complaint or report with the Protecteur de l'intégrité en loisir et en sport (PILS):

• A complaint can be made by anyone, of any age, who has suffered harm to their physical or psychological integrity during a recreational or sports activity.
• A report can be made by anyone, of any age, who witnessed such harm during a recreational or sports activity.

So a parent who saw something happen to a child can file a report, and a young person can file a complaint about what happened to them.