Русско-англо-русский юридический словарь

Self-determination denotes the legal right of people to decide their own destiny in the international order. Self-determination is a core principle of international law, arising from customary international law, but also recognized as a general principle of law, and enshrined in a number of international treaties. (law.cornell.edu)

The protection of archives and documents and the insurance of free communication are essential for the effective functioning of embassies and consular posts. As such, the inviolability of archives and documents has since long been accepted as a rule of customary international law. (The Oxford Handbook of Modern Diplomacy edited by Andrew F. Cooper, Jorge Heine, Ramesh Thakur)