Constitutional Review of the National Security Adviser’s Powers Under Nigerian Security Law

The National Security Adviser occupies a constitutionally ambiguous position within Nigeria's security governance architecture, with powers that are not clearly defined by statute yet exercise significant influence over intelligence coordination, counter-terrorism operations, and national security policy. The absence of clear legislative authorisation for the NSA's operational powers raises constitutional concerns about executive accountability, parliamentary oversight, and the rule of law in Nigeria's security sector. This study examines the constitutional and statutory basis of the National Security Adviser's powers, evaluating the adequacy of existing legal frameworks for accountability and oversight. A doctrinal research methodology is applied, reviewing the 1999 Constitution, the National Security Agencies Act, executive orders and letters establishing the NSA's mandate, parliamentary committee oversight records, and comparative legislative frameworks from the United Kingdom and South Africa. The study evaluates the gap between the NSA's operational powers and their statutory authorisation against constitutional principles of separation of powers and executive accountability. Available security law literature from Nigeria identifies the absence of a dedicated NSA enabling statute as the primary constitutional deficiency, enabling unchecked executive security power. The Democratic Security Governance Framework and the Parliamentary Oversight Standards of the Geneva Centre for Democratic Control of Armed Forces provide the normative reference. Recommendations address enactment of an NSA Establishment Act with explicit powers and parliamentary oversight mechanisms. Keywords: national security adviser, security law, constitutional law, executive accountability, Nigeria.