A more thorough explanation:

Treaty-made law, also known as conventional law, refers to a set of rules or systems of rules that are agreed upon by individuals or parties to regulate their conduct towards each other. These rules are considered to have the force of special law between the parties involved, either by supplementing or replacing the general law of the land.

• Conventional international law
• Rules and regulations of a country club or professional association
• Rules of games such as golf, basketball, or any other game

For example, when countries sign a treaty, they agree to follow certain rules and regulations that are outlined in the treaty. These rules become treaty-made law and are binding on the countries that signed the treaty. Similarly, when individuals join a country club or professional association, they agree to follow the rules and regulations set forth by the organization. These rules become conventional law and are binding on the members of the organization. Finally, when individuals play a game such as golf or basketball, they agree to follow the rules of the game. These rules become treaty-made law between the players and are binding on them during the game.