Maybe more a lack of concern by ECNL in SC than ECNL in general. There used to be additional pages at the ECNL website, one of which explained ECNL's support for participation in High School to the extent of scheduling the ECNL events to avoid conflict with the FALL high school leagues. I imagine most of the original club members of the Red Bull League (origin of ECNL) played high school in the Fall. So, it's not every club that has a conflict between HS and ECNL, and where there is a conflict it may have more to do with the individual club's lack of concern for HS soccer than the ECNL organization as a whole.