Purpose: This study examines the relationship between the Nigerian legislature, law and morality, with emphasis on ethical conduct, legislative integrity, conflicts of interest, public trust and accountability.
Methodology: The study adopted a qualitative documentary research design, relying on constitutional provisions, legislative codes and rules, official parliamentary documents, judicial materials, international parliamentary standards and scholarly literature published substantially between 2019 and 2026, with comparative lessons drawn from Canada, Japan, South Korea and Lesotho.
Results: The study finds that legality constitutes the minimum enforceable standard for legislative conduct, whereas morality encompasses broader expectations of honesty, responsibility, fairness, restraint and commitment to the public interest, and that Nigeria possesses constitutional and institutional mechanisms addressing public-officer conduct, asset declaration, conflicts of interest and legislative ethics, but that the existence of rules does not automatically guarantee ethical legislative behaviour.
Conclusions: Ethical standards become more effective when supported by independent advice, disclosure mechanisms, enforceable conflict-of-interest rules, ethics committees, public reporting and sustained ethical education, and Nigeria's legislative culture should be built on the combination of law as the minimum standard and morality as the guide to responsible discretion.
Limitations: The documentary design does not incorporate primary interviews with legislators, ethics officers or affected stakeholders.
Contributions: The study proposes a strengthened enforcement architecture, institutionalised conflict-of-interest disclosure and a continuous ethics and public-integrity programme for the Nigerian legislature.