Can an international treaty prevail over a national constitutional norm?
These international rules take precedence over national laws and directly create rights and duties domestically. Treaties can have the same effect as legislation when ratified, but only take precedence over laws adopted prior to the ratification of a treaty.
The United States typically respects the laws of other nations, unless there is some statute or treaty to the contrary. International law is typically a part of U.S. law only for the application of its principles on questions of international rights and duties.
Introduction. International laws are considered superior to national laws. This seems quite obvious as the States apply international rules to prepare their national laws.
As a supreme or higher law, its provisions provide a framework under which all regulations, legislation, institutions, and procedures operate. It articulates the rights of citizens that institutions, procedures or legislation must not infringe, and which the state must strive to ensure.
In contrast to the dubious effi- cacy of international law, constitutional law is generally assumed to serve as an important and effective constraint on government behavior, a mean- ingful check on the interests of the powerful.
The most obvious limitation of international law is the lack of an international 'sovereign' – some form of international government. 'Law' in domestic terms is traditionally viewed as a set of commands backed up by threats, such as the law against murder that carries the threat of a long prison sentence.
The objective of the International Law is to achieve global justice and resolve the dispute amicably, that ultimately helps individuals. The development of many areas in the International Law such as International Human Rights Law with the objective to protect the interest of the individual.
Provisions in treaties and other international agreements are given effect as law in domestic courts of the United States only if they are "self-executing" or if they have been implemented by an act (such as an act of Congress) having the effect of federal law.
The justification is two-pronged: 1. international law can facilitate mutually beneficial cooperation internationally, and 2. international law is in a position to help those most vulnerable to abuse, oppression, and harm.
A great limitation of international law is that it cannot intervene in the matters which are within the domestic jurisdiction of States. Thus, international law is a weak law in comparison to the municipal law.
Is the international law most important source of law?
While treaties and custom are the most important sources of international law, the others mentioned in Article 38 of the ICJ Statute of the ICJ should not be ignored. General principles of law recognized by civilised nations – the third source – are seldom mentioned in judgments.
In matters of international law, such as war crimes and human rights violations, the main judicial faction of the United Nations, the International Court of Justice (ICJ), stands as the highest court of international law in the world.

The Rule of Law is the Higher law that regulates the affairs of a nation's constitution.
Because they form the framework for all decisions and actions of officials, the rules and principles outlined in constitutions are normally regarded as superior to laws passed by the legislature. This means that representatives in the legislature should only pass a law if it is compatible with the constitution.
Treaties. The supremacy of treaties over state law has been described as an "unquestioned axiom of the founding" of the United States. Under the Supremacy Clause, treaties and federal statutes are equally regarded as "supreme law of the land" with "no superior efficacy ...
Key Differences Between Constitution vs Law
To sum up, the Difference Between Law and Constitution is that law refers to one single rule or regulation that the government makes for the welfare of its citizens. In contrast, the Constitution refers to all rules and regulations in a document governing a country.
The Final Constitution is clear that customary international law automatically forms part of our domestic legal system, whilst treaties only become a part of our law through a separate act of adoption.
International law is formed by the mutual consent of nations, given either by international practice or by treaty agreement. Such practices and agreements may involve only two nations (bilateral agreements) or they may extend to many nations (multilateral agreements).
What happens if someone breaks the law? They can be arrested, stand trial, and pay a fine or go to prison if found guilty.
conceded that it is a weak law. ¹ Its rules are not as effective as rules of municipal law are. It is so because of many reasons which are as follows: (1) Rules of International Law which exist as a result of international treaties and customs are not comparable in efficacy to State legislative machinery.
What happens if there is no international law?
Without it, there could be chaos. International law sets up a framework based on States as the principal actors in the international legal system, and it defines their legal responsibilities in their conduct with each other, and, within State boundaries, with their treatment of individuals.
Some important functions of international law include: To maintain International Peace and Security. To provide fundamental freedom and human rights. To refrain from the threat or use of force by a state against the territorial integrity or political independence of any State.
The effectiveness of international law
For any law to be effective it needs to fulfill all the criteria that make it a 'law'. The most basic and fundamental principle of any law is its supremacy. Thus, for any law to be considered a law, it should be thought of as commanding and must be held supreme.
Unlike national or domestic law, international law is not set down in any legislation approved by a parliament. Even multilateral treaties do not apply to all states, but only to those which have consented to be so bound, by signing and ratifying or acceding to them.
As such, it has been accepted that, in the context of joining treaties, the violation of domestic law can invalidate treaty consent under international law, upon invocation by the state, even if given by representatives with ostensible authority to bind their state under international law.