It also requires local police, after making a "lawful contact", to check the immigration status of people who cause "reasonable suspicion", and to arrest them if they lack documents.
The relation of ship arrest is a kind of civil procedure legal relation. All of subject, object and content of relations of ship arrest should be lawful.
船舶扣押关系实质是民事诉讼法律关系，其主体、客体和内容应符合法律的相应规定。
3
The law compels local police during a lawful stop, detention or arrest to check the immigration status of people they reasonably suspect are illegal immigrants.