Most of the teams that are not from Long Island have much older kids on the team. Lacrosse is based on grad year so if there's a 16 year old kid graduating in 2025 then it's within the rules. Until youth lacrosse cleans up their act like other sports, this will be the result. Birth year is the easiest way, get valid birth certificates, submit rosters, etc. It's not that difficult. Every other sport is run this way.