General and regional rules of international law

There is a recognised distinction between general and regional rules of International Law,that is to say between rules,which are of universal application and rules which have developed in a particular region of the world as between the states there located without becoming rules of a universal character.The best illustration of such regional rules are those which have been commonly followed by the group of Latin American states for asylum,This so-called ( Latin American International Law ) and the nature of regional rules were discussed by the International Court of Justice in the Colombian-Peruvian Asylum case(1950) according to the judgements in this case:
1-regional rules are not necessary subordinate to general rules of international law but may be in a sense - complementary or correlated there to.
2-an international tribunal must as between states in the particular region concerned give effect to such regional rules as are duly prived to the satisfaction of the tribunal.