Once you've set a national standard—I'll come back to that—you can encourage the different groups to conform to it.
My question to the folks who ask what, as a parent, they can do, is whether they are wearing helmets when they're on a bike. Are they wearing helmets when they're coaching on a hockey rink?
Those are examples of best practices. Introducing those things through sports associations, provincially and federally, and through procurement policies are all the pieces that can be put in place.