Nowhere in the works of what is called Aristotle is there a discussion of anything named Natural Law. Everywhere in the works of what is called Aristotle there are discussions of principles and there are discussion of laws; separately. And for this reason:

Nature abides by principles. Humans make laws. By nature, aggression is the principle. Since aggression impedes each particular person in the same way, a universal manner, this universal offense is the impetus for a prescription of any law at all. Law was first prescribed to prohibit that natural aggression. Hence, there is no non-aggression principle. Aggression is the principle, non-aggression is the law. The purpose of good law is to protect and maintain this natural justice of equality before any law. Unjust laws are an attempt to establish some other sort of equality that is not universal. Seeing this distinction of principles and laws as separate makes clear what is right by nature and wrong by law.

However, at some places in the works of what is called Aristotle there is a discussion of what may be named natural rights, political rights, and natural justice. The preceding paragraph is the application of Aristotle’s CATEGORIES, INTERPRETATION, ANALYTICS, TOPICS, and RHETORIC as the means of separating the true from the false.