Consists of rules of conduct established by the government of a society to maintain stability and justice in that society.

Spells out the principles by which that country's government operates.  Most fundamental law of the country.

Laws passed by the U.S. Congress, state legislatures, local city councils, or town meetings. 

Decisions of the early law courts developed in England, based on customs. 

When a judge is required to follow an earlier court decision when deciding a case with similar circumstances.

Action or law that is no longer valid

Those rules and procedures established by regulatory agencies.