Final answer:
A contract for car insurance is governed by common law principles.
Step-by-step explanation:
The answer to the question is common law.
A contract for car insurance is governed by the principles of common law. Common law refers to the body of law that is derived from judicial decisions and precedents, rather than from legislation. It is the law that has developed over time through court decisions.
For car insurance contracts, common law principles would apply in determining the rights and obligations of the parties involved, as well as the interpretation and enforcement of the contract.