49. 首先，对于跨时期原则存在着例外情况，其中包括：(a) 某一行为是持续发生的，并延续到国际法认为该行为系违法行为之时，160 或(b) 不法行为的直接而持续的后果一直延续到该行为及其后果被视为国际性不法行为之时。161这就是说，根植于或由殖民主义和奴隶制造成的种族歧视在每一种被定性为非法之后，都不能受到跨时期的约束。第二，跨时期原则不适用于奴隶制和殖民主义在当今
49. First, the intertemporal principle is subject to exception, including when (a) an act is ongoing and continues into a time when international law considered the act a violation,160 or (b) the wrongful act’s direct ongoing consequences extend into a time when the act and its consequences are considered internationally wrongful. 161 That means that racial discrimination rooted in or caused by colonialism and sla very that occurred after each had been outlawed cannot be subject to the intertemporal bar.