Maritime disputes are multifaceted. They include overlapping claims of sovereignty and jurisdiction, contests over freedom of navigation, island-building and militarization, and the use of ‘grey zone’ tactics to harass, intimidate and advance strategic interests. Maritime disputes have become highly visible microcosms of broader discord between the US-led regional security order, and challenger conceptions of order that see a bigger role for rising powers in generating new rules and alternative interpretations of existing international law. In this presentation Dr Bec Strating compares and contrasts the maritime security interests of key Indo-Pacific states and their attitudes to maritime rules, and reflect on the potential implications for regional maritime order building.