States, being the fundamental forms of political organization of contemporary societies, are presently undergoing dynamic transformations connected with the processes of globalization and integration, among others in the field of the functions exercised by them, as well as the way of their performing. This has considerable significance, especially in the context of state security, for its assuring to citizens, both in the internal and external dimensions, is still one of the most important objectives of emerging and lasting of such a community. Key is also here the problem of the new comprehension of sovereignty. Among the most essential factors influencing this substance are undoubtedly globalization and regional integration processes. Thus, the 21st century states in the whole world are facing totally different, unknown hitherto challenges, requiring from them to adapt their tasks and, in consequence, also their legal orders to the constantly changing political and legal reality.