It isn't academically qualified...it is scholastically qualified. There isn't a set requirement, however, almost every aspect of your application is reviewed -- academics (courses, strength/performance in curriculum), SAT/ACT scores, activities, leadership ability, BGO interview, athletics (possibly CFA), teacher recommendations, school official comments, high school strength, etc. This is why the Admissions Board decides candidates' scholastic qualification -- it isn't a perfectly conditional process (i.e. X + Y + Z = scholastically qualified).