Within each institutions overall admissions process, from October 1 through March 15 an admission office may issue probabilistic communications, in writing, to applicants who are recruited student athletes. (Such probabilistic communications given by coaches, whether orally or in writing, do not constitute binding institutional commitments.) An applicant who receives one or more such written communications and who has made a decision to matriculate at one institution is encouraged (but not required) to notify all other
institutions, and to withdraw all other applications, as promptly as possible.
An institution may send a likely probabilistic communication letter to a candidate (whether or not the applicant is a recruited student-athlete) only if the applicant has submitted all of the materials which the institution requires in order to make an admissions decision.
No information referring to the admission or financial aid status of an applicant to an Ivy institution may be considered official unless it is received directly from that institutions admission or financial aid office.
the LL dates are from October 1 until the school says it ends the end of their app process.