[rurcliped]

It's documented at https://www.nacacnet.org/globalassets/documents/advocacy-and... as "if a candidate has been admitted Early Decision, then the college may notify the candidate’s high school and other colleges of the candidate’s application status." This is linked from https://www.nacacnet.org/advocacy--ethics/SPGP-NACAC-Code-of... on the NACAC's website.