The preamble establishes India as a sovereign, socialist, secular, democratic republic that aims to secure justice, liberty, equality and fraternity for all citizens. The constitution was adopted on November 26, 1949 and enacted on January 26, 1950. It establishes a federal structure with three lists delineating powers of central and state governments. The constitution guarantees fundamental rights like equality, freedom of speech and religion. It also establishes fundamental duties and directive principles of state policy. The hierarchy of courts includes the Supreme Court, high courts and district courts, with the Supreme Court having writ jurisdiction to enforce fundamental rights.