International law, like other fields of law, is not static. It develops constantly, accommodating the changes in international practice, attitudes of States, and the changing needs and requirements of the international community. According to the ICJ, ‘the possibility of the law changing is ever present’. At the same time, the notions of legal stability and security are inherent in the concept of law. Considering the development of law, we are still confronted with the trend to guarantee stability.