There is no universally accepted definition of administrative law, but rationally it may be held to cover the organization, powers, duties, and functions of public authorities of all kinds engaged in administration; their relations with one another and with citizens and nongovernmental bodies; legal methods of controlling public administration; and the rights and liabilities of officials. Administrative law is to a large extent complemented by constitutional law, and the line between them is hard to draw. The organization of a national legislature, the structure of the courts, the characteristics of a cabinet, and the role of the head of state are generally regarded as matters of constitutional law, whereas the substantive and procedural provisions relating to central and local governments and judicial review of administration are reckoned matters of administrative law. But some matters, such as the responsibility of ministers, cannot be exclusively assigned to either administrative or constitutional law. Some French and American jurists regard administrative law as including parts of constitutional law.
administrative law is to ensure efficient, economical, and just administration. A system of administrative law that impedes or frustrates administration would clearly be bad, and so, too, would be a system that results in injustice to the individual. But to judge whether administrative law helps or hinders effective administration or works in such a way as to deny justice to the individual involves an examination of the ends that public administration is supposed to serve, as well as the means that it employs.