A more thorough explanation:

Definition: Jus fetiale is a Latin term that refers to the law of negotiation and diplomacy. It captures the classical notion of international law.

Examples:

• When two countries are negotiating a treaty, they must follow the principles of jus fetiale to ensure that the negotiations are fair and just.
• During ancient Roman times, the fetials were responsible for enforcing jus fetiale and ensuring that treaties were respected.

The examples illustrate how jus fetiale is used in the context of international relations. It emphasizes the importance of fairness and justice in negotiations between countries. The fetials in ancient Rome were responsible for upholding this law and ensuring that treaties were respected, which shows how seriously it was taken.