A.The Relationship between Constitutional Law and Other Disciplines
Studying Constitutional Law, we will study specifically related to state institutions, the functions of state institutions, state structures and others. In general, Constitutional Law studies or studies the state as its object, so Constitutional Law cannot be separated from several other sciences that both have the object of state studies because they are closely related such as State Science, State Administration Law and so on.
a.Relation between Constitutional Law and The General Theory Of State
According to Moh Kusnardi and Harmaily Ibrahim, The general theory of state serves as an introductory science to study constitutional law that applies in Indonesia as positive law. In studying the general theory of state, it cannot be used directly in practice, because the general theory of state studies the state in an abstract or theoretical sense, the general theory of state studies theories, basic notions and basic joints regarding the state. In contrast to studying constitutional law, it can be used directly because of its practical nature. For example, in carrying out decisions, the general theory of state is not concerned with how the law should be implemented, because state science is theoretical, while constitutional law can be used directly in practice, because of its practical nature.
b.Relationship between Constitutional Law and Political Science
J. Barent argues that the relationship between constitutional law and political science is that constitutional law is like a human skeleton, while political science is likened to the flesh that wraps the skeleton.21 As has been stated that constitutional law is the law governing the organization of the state and state institutions, while one of the definitions of political science is that political science studies the formation and distribution of power.
Constitutional law studies legal regulations governing the organization of state power, while political science studies power from the aspect of the behavior of power. Every legal product is the result of a political process or political decision because every law is essentially compiled and formed by political institutions, while constitutional law sees laws as legal products formed by state equipment that are authorized through procedures and procedures that have been determined by constitutional law.
The close relationship between law and political science gave birth to a new field of study, namely legal politics. The politics of law discusses how a law is drafted and passed through a political process, so that a law is not only a legal product but also a political product. A legal product because it is formed by an institution authorized to form laws, and a political product because it is the result of a political agreement from members of parliament who come from several political parties.
c.Relationship between Constitutional Law and State Administrative Law
Relationship between Constitutional Law and administrative law in a broad sense is part of constitutional law. Among legal experts there are different views on the relationship between constitutional law and state administrative law. The difference between constitutional law and state administrative law lies in the notions of "governance" and "administration".
Van Vollenhoven in his writing entitled Thorbeke en het Administratief said that constitutional law is the law of the state in a state of stop (silent, static), while state administrative law is the law of the state in a state of motion (work, dynamic). The point is that HTN studies the structure of institutions and their functions while HAN studies the implementation of the duties and functions of these state institutions.