Nigeria's oil spill regulatory architecture rests on two foundations: the National Oil Spill Detection and Response Agency (Establishment) Act 2006 and the Petroleum Industry Act 2021. Both statutes vest environmental oversight authority in different agencies, NOSDRA under the 2006 Act, and the Nigerian Upstream Petroleum Regulatory Commission (NUPRC) and Nigerian Midstream and Downstream Petroleum Regulatory Authority (NMDPRA) under the PIA. This article examines each framework's enforcement mechanisms, remediation obligations, and compliance requirements to demonstrate that Nigeria operates a dual-mandate system without explicit coordination provisions or conflict-resolution mechanisms.

This article shows that NOSDRA's preventive and response mandate under the 2006 Act operates alongside, not subordinate to the PIA's sector-specific environmental obligations. The article traces each statute's enforcement architecture, civil liability provisions, and institutional design to reveal overlapping jurisdiction over identical conduct: oil spill prevention, response, remediation, and post-incident compliance monitoring. This parallel authority structure creates genuine uncertainty for regulated entities navigating environmental obligations in Nigeria's petroleum sector.

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