I was always amused at the "cherry" appellation as S.I. was always one of the schools to beat in the major sports and some of the minors also. When we left to join the WCAL(?) the public schools shed no tears.
The dress code seems about the same as when I was there, although polo shirts were not specified.
When they say the student will be "asked" to make appropriate changes to garments, makeup, etc. it is "asked" in anticipation of immediate compliance.