Agreed. High level youth baseball and basketball require coaches to bring the roster and the birth certificates to the big tournaments - lacrosse will need to do the same. US Lacrosse is trying to align grade with age by having a birthdate cut-off of August 31, which is a good idea. if you are born September, 1999 (or later) you are a 6th grader for school (public school in NY) and a 12 yr old (2018) for purposes of Summer travel lacrosse. So sept/oct/nov/dec 99's aren't 'cheating' by being in 6th grade or playing 2018...they're just on the older side, but legal for both.