If I am not mistaken...
The official USYSA season does not end until after the National Championships in the summer, whether your team makes it or not. For most U15-U18 teams the season unofficially ends in December of the previous calendar year. Team rosters are frozen, I believe in early November. Should a player be allowed to be on two rosters simultaneously? Of course not.
The rule is a good one. It keeps the respective state champs from going out and finding ringers from other teams that may improve their chances of winning at regionals. (Of course, any coach that would actually do this would be acting reprehensibly, in my opinion. But, I also wouldn't put it past some coaches I know.)
If a player is playing up to an age group that, in most cases, will only have a Fall season even though their "age appropriate" age group plays in the spring also, they (and their parents) need to be made aware of the consequences
