Terms for subject Law containing Could Have

English	Russian
could not have been unaware	не мог не знать (Khrushchov)
something that someone could not reasonably be expected to have known about	ожидать осведомлённости такого-то о чём не могло быть разумных оснований (Andy)
that could otherwise have been limited	который может быть ограничен по каким-либо причинам (Andy)