Papua New Guinea's four regions constitute the highest tier in the country's three-level administrative structure. These regions serve primarily as a framework for coordinating development planning, resource allocation, and inter-provincial cooperation across geographically and culturally related areas. While the regions themselves do not possess autonomous governing bodies or legislatures, they function as administrative groupings that facilitate regional development initiatives and help organize service delivery across multiple provinces. The regional structure enables the national government to implement broader policy objectives and manage infrastructure projects that span provincial boundaries, particularly in areas such as transportation networks, economic development programs, and resource management.