This principle of jurisdiction, however, interplays with the principle of complementarity. It means national jurisdictions, just like the Philippines, have primacy over the ICC, as far as investigating, prosecuting and trying cases – like the crime against humanity of murder under the Rome Statute of the ICC – are concerned. Hence, in the context of the open-season murder of drug suspects, the Philippines, and not the ICC, is the one that theoretically has primacy to carry out investigations, prosecutions, and trial.