It is the branch of Law responsible for regulating personal relations, as well as business relations with other countries or foreign companies, always based on respect for the sovereignty of States.

The principles of International Law constitute guidelines that regulate the behavior of States and private companies. The processes may involve granting citizenship and its implications, in addition to informing which legislation must be applied in a given conflict of private interests of companies or institutions. It also works within the scope of Criminal Law, in the event of a crime, or even to resolve family issues, such as a divorce, adoption or the opening of succession.