摘要：Customary international law becomes topical in the domestic context in areas where international treaty norms are missing, are not binding on the state or have become obsolete. Although the formation and modification of rules of customary law is generally a long process, it is often the case that customary rules are the first response to problems that need to be solved in international life. Despite codifications of customary rules, life is constantly changing and new rules of customary law take their place alongside treaties all the time. Several issues today are still under the exclusive regulation of customary law –– for example state immunity, state responsibility or status of foreigners.*1
