The causal link between the wrongful act and the injury suffered was determined by the primary rule, so the facts had to be known before the distinction between directly injured States and other States could be ascertained.
不法行为和遭受的损害之间的因果关系是由主要规则决定，因此必须先知道事实，然后才能查明直接受害国和其他国家之间的区别。