I am very curious about several aspects:
1. How will most of the clubs implement this rule in the "suggested" season (2016-17). (I know the current season is just starting.)

2. How will the tournaments respond?

3. How will U.S Lacrosse implement verification? Anyone who has been a member for X number of years is grandfathered. all new players submit proof to a "certifying official" at a US Lacrosse sanctioned tournament. Or leave it to the coaches. Who would have to provide proof

As a former certifying official for Basketball, I had a 6-ft kid who used his 8th grade brothers birth certificate to try to play 15U. (He was a older sophomore). (Hint: do not drive yourself to the verification)