Why does every club make it mandatory that your kid has a US Lacrosse ID number? Because of the insurance it provides your kid. So with that comes power. What US Lacrosse needs to do is add a stipulation that their insurance is only covering players who participates in US Lacrosse rules based tournaments. So now if your kid gets hurt in some NLF tournament their is no insurance and maybe now the parent whose kid gets injured can sue the tournament for injuries occurred by a player 2 years older!! Do you want to see how fast everyone conforms then!! Insurance is too expensive.