Article 352 of the Indian Constitution empowers the President to declare a national emergency in response to threats to national security, war, or internal disturbances.

The primary objective of National Security Law is to protect the sovereignty, territorial integrity, and vital interests of a nation from internal and external threats.

The Principle of Self-Defense, enshrined in international law, recognizes the inherent right of a nation to use military force to defend itself against imminent or actual armed attacks.

The use of military force in national security operations is governed by both domestic law, which sets out the legal framework for the deployment and use of armed forces, and international law, which regulates the use of force between nations.

The Geneva Conventions and Hague Conventions are the primary legal frameworks that establish the rules and procedures for the conduct of armed conflict, including the protection of civilians, prisoners of war, and the wounded.

The use of intelligence gathering and surveillance in national security operations is primarily governed by domestic law, which sets out the legal framework for the collection, use, and dissemination of intelligence information.

The Principle of Proportionality requires that the use of force by law enforcement agencies in national security operations must be proportionate to the threat posed and must not be excessive or arbitrary.

The detention of individuals suspected of posing a threat to national security is primarily governed by domestic law, which sets out the legal framework for the arrest, detention, and release of individuals suspected of committing national security offenses.

The Principle of Due Process requires that individuals accused of national security offenses are entitled to a fair and impartial trial, including the right to legal representation, the right to present evidence, and the right to challenge the evidence against them.

The protection of classified information in national security operations is primarily governed by domestic law, which sets out the legal framework for the classification, handling, and dissemination of classified information.

The Principle of Need-to-Know requires that intelligence information is only shared with individuals who have a legitimate need to know the information in order to perform their duties.

The oversight of national security agencies by legislative and judicial bodies is primarily governed by domestic law, which sets out the legal framework for the powers and responsibilities of these bodies in overseeing national security activities.

The Principle of Accountability requires that national security agencies are accountable for their actions and must be subject to legal and political oversight.

The cooperation between national security agencies of different countries is often governed by treaties and conventions that set out the legal framework for the exchange of intelligence information, joint operations, and other forms of cooperation.

The Principle of Peaceful Settlement of Disputes requires that disputes between national security agencies of different countries should be resolved through peaceful means, such as negotiation, mediation, or arbitration.