1. Contracts in violation of positive law.

2. Positive law, embedded in institutions with legal sanctions , has a normative force on its own.

3. But positive law broke primitive harmony in order to keep social order.

4. Law ( positive law ) is produced by the conflict relation among powers.

5. Positive law is the main source of continental legal system, while the source of law in Anglo-American countries is based on judicial precedent.

6. The natural laws effectuation on positive law mainly in two aspects, the first one is direct channel; the second one is indirect aspect.

7. The third chapter describes the preliminary contract regime in the Macau positive Law.

8. It is a perpetual law that no human or positive law can be perpetual.

9. There is nothing just or unjust but what is commanded and forbidden by positive law.