Final answer:
In international law, laws are applicable only to parties who voluntarily choose to participate in them. International law consists of formal and informal rules that loosely govern the international system through treaties, international agreements, and customary law.
Step-by-step explanation:
In international law, laws are applicable only to parties who voluntarily choose to participate in them. This statement is true.
International law is a set of formal and informal rules that loosely govern the international system. It is established through treaties, international agreements, and customary law. Sovereign states willingly enter into these agreements and comply with their obligations, while non-state actors also play a role in the development and implementation of international law.
For example, states that sign international conventions commit to follow the guidelines set forth in those documents, and treaties like the Paris Climate Accord require states to modify their domestic policies to address common issues such as climate change.