Context: Treaties can be loosely compared to contracts: both are means of willing parties assuming obligations among themselves, and a party to either that fails to live up to their obligations can be held liable under international law.

Question: What must a party to a treaty do to prevent being held liable under international law?
Answer: live up to their obligations

Question: What is comparable in domestic law to a treaty in international law?
Answer: contracts

Question: Under what will a party to a treaty be held liable for failing to uphold their obligations?
Answer: international law

Question: What must be the attitude of a party towards assuming the legal obligations of the treaty?
Answer: willing

Question: What do we call the willingly-assumed burdens placed upon parties to both treaties and contracts?
Answer: obligations