Complex sentence: Not only do codes of conduct apply while attending the schools at home, while studying abroad schools also implement a code of conduct for international study abroad programs which carry over many of the same rules found in most student handbooks.
Split into simpler sentences: Not only do codes of conduct apply while attending the schools at home, but also while studying abroad. Schools also implement a code of conduct for international study abroad programs which carry over many of the same rules found in most student handbooks.