国法学
Public law governs the relationship between people and the state and comprises three types: constitutional law, criminal law, and administrative law. "Constitutional law" governs the principles and the powers of the government and the relationships between the different parts of the government. "Criminal law" restricts conduct that threatens safety and welfare of society or the state. "Administrative law" regulates the operation and the procedures of government agencies. The judicial branch of government interprets the laws, and its body of laws is called case law.