those 뒤에 who are 생략된 건가요?

Preference will be given to those (who are) currently enrolled in trade school.
여기서 those 뒤에 who are가 생략된 게 맞나요?
그리고 If you choose not to subscribe, return the bill marked cancel, and (you) owe nothing.에서는 주어 you를 생략할 수 있나요?