Analytical Examination of Intergovernmental Relations and Concurrent Legislative List Conflicts in Nigeria’s Federal System

Nigeria's 1999 Constitution distributes legislative powers between the federal and state governments through exclusive and concurrent legislative lists, with residual powers vested in states. The concurrent legislative list has generated significant intergovernmental legal conflicts where federal and state legislation on the same subject matter co-exist, creating applied constitutional questions about supremacy, conflict, and cooperative governance. This study analytically examines selected intergovernmental legislative conflicts arising from the concurrent legislative list in Nigeria's constitutional system, evaluating the constitutional framework for resolving concurrent list conflicts, judicial approaches to federal supremacy claims, and the adequacy of cooperative federalism mechanisms. A doctrinal methodology with comparative analysis is applied, reviewing the Second Schedule of the 1999 Constitution, relevant Supreme Court decisions on concurrent list conflicts from 2010 to 2023, selected state and federal concurrent list legislation, and comparative frameworks from Australia and South Africa. The study analyses specific conflict areas including electricity regulation, industrial relations, and health, where federal and state laws have generated enforcement tensions. Available federalism literature from Nigeria identifies the absence of an intergovernmental relations framework statute and judicial inconsistency in applying federal supremacy standards as the most analytically significant institutional gaps. The Cooperative Federalism Theory and the Federal Supremacy Doctrine provide the analytical reference. Findings support recommendations for an Intergovernmental Relations Act and clearer concurrent list delineation. Keywords: intergovernmental relations, concurrent legislative list, federalism, constitutional law, Nigeria.