Isn't really a question so
i'm guessing it is true.
It would be an "embargo" that occurs when one nation refuses all trade with another, although usually these embargo's only apply to a single group of goods, not all goods at the same time.
The laws that people had to follow
Answer: serving on a jury when called to do so
Explanation:
That way if it someone they have never met they can use that in their defense and if they do know this person and they know that person is holding a grudge or purposely trying to ruin their reputation the defense can object