Delineating Legal Boundaries: Exclusive and Cooperative Boundaries in the Plural Legal System of Malaysia

This article examines the evolving nature of legal boundaries within Malaysia's plural legal system, focusing on how civil and Islamic jurisdictions are differentiated and coordinated in practice. It contrasts two distinct models of legal boundary-making: contested and exclusive boundaries in personal law – particularly in cases involving unilateral child conversion – and the more cooperative, integrated approach seen in Islamic banking and finance. Through close analysis of case law and institutional arrangements, the article demonstrates how legal pluralism in Malaysia is not static but shaped by judicial interpretation, political contestation, and legislative reform. In personal law, jurisdictional ambiguity has produced inconsistent outcomes and legal uncertainty, often disadvantaging non-Muslim litigants. Conversely, Islamic finance has developed a more coherent framework, with civil courts working alongside Islamic authorities to ensure both legal enforceability and religious compliance. The article argues that legal boundaries in Malaysia are sites of negotiation over identity, authority, and justice, and concludes that a sustainable legal framework requires clarity and protection of fundamental rights across legal systems.