Mambilla Arbitration Highlights Importance of Contractual Governance and Compliance Controls

The outcome of the long-running arbitration over Nigeria’s Mambilla Hydroelectric Power Project highlights the importance of contractual authority, documentary controls and due diligence in major public-sector transactions, irrespective of the political circumstances surrounding the project.

 An International Chamber of Commerce tribunal in Paris on 17 September rejected claims brought by Sunrise Power and Transmission Company Limited in connection with the proposed Mambilla project. The dispute had exposed Nigeria to claims running into billions of dollars and had remained unresolved for several years.

 The immediate compliance significance of the ruling lies less in the political debate surrounding the project than in the questions that arose over how contractual commitments and subsequent settlement arrangements were authorised, documented and managed.

Authority and Approval…

 At the centre of the dispute was a 2003 agreement concerning the development of the Mambilla project under a build-operate-transfer arrangement. The Nigerian government has maintained that the original contract did not receive the necessary Federal Executive Council authorisation. The question of whether the agreement and subsequent arrangements were properly authorised became an important element of the arbitration.

 For compliance professionals, the issue illustrates a fundamental control requirement in government contracting: material contractual commitments must be supported by clearly established authority and an auditable approval trail.

 This is particularly important where projects involve multiple government departments, ministers, advisers, external counsel and private-sector counterparties. Delegated authority should be documented, and material changes to an existing agreement should ordinarily be subject to appropriate legal and institutional review.

 Settlement Arrangements

 The dispute also involved settlement arrangements negotiated after the original disagreement. According to the Nigerian government, Sunrise sought $680 million plus interest under one claim, while a related arbitration involved claims exceeding $2.7 billion. The tribunal ultimately rejected the claims.

 From a compliance perspective, settlements can create risks distinct from those associated with the underlying contract. A settlement may substantially alter the financial or legal position of a government entity and therefore requires clear evidence that the individuals negotiating and approving it possess the necessary authority.

 The Mambilla proceedings demonstrate why settlement documentation should be supported by comprehensive records showing the parties involved, the authority relied upon, the legal basis for the agreement and any required approvals.

 Documentation and Institutional Controls

 The case also underscores the importance of maintaining contemporaneous records throughout the life of a major infrastructure contract.

 Large projects can span successive administrations and changes in personnel. Where contractual decisions made years earlier are subsequently challenged, correspondence, approval documents, meeting records, legal advice and evidence of delegated authority may become central to establishing what was agreed and who had the power to agree it.

 This is not unique to government. The same principle applies to multinational companies and financial institutions involved in infrastructure, energy and other heavily regulated sectors.

 Effective compliance programmes should therefore extend beyond initial procurement or onboarding checks. They should include ongoing monitoring of contractual amendments, changes in counterparties, settlement negotiations and changes in the authority of officials or representatives involved in the relationship.

 Arbitration and Financial Exposure

 The financial scale of the Mambilla dispute also illustrates why arbitration risk should form part of broader enterprise-risk management.

 International arbitration can involve substantial legal costs and potentially significant contingent liabilities. A disputed contract can therefore affect not only the legal department but also finance, procurement, risk, compliance and senior management.

 The tribunal’s decision included an order requiring Sunrise Power and its promoter, Leno Adesanya, to reimburse Nigeria 75 per cent of its legal fees and expenses incurred during the arbitration.

 Sunrise has said its lawyers are reviewing the award and that it will consider the lawful options available to it following that review.

Lessons for Compliance Functions

 The broader lesson from the dispute is that contractual governance can be as important as traditional financial-crime controls when organisations enter high-value public-sector transactions.

 Companies participating in major government projects should establish clear approval matrices, verify the authority of government representatives, maintain complete records of negotiations and conduct appropriate legal and compliance reviews before agreeing material amendments or settlements.

 They should also ensure that third-party due diligence is proportionate to the value and sensitivity of the transaction, with particular attention to beneficial ownership, conflicts of interest, intermediary relationships and unusual payment arrangements.

 For government entities, the same principles apply from the opposite direction: procurement decisions, contract awards and settlements should be supported by transparent approval processes and records capable of demonstrating compliance with applicable law.

 The Mambilla arbitration therefore provides a practical case study in the consequences that can arise when a major infrastructure project becomes entangled in questions of contractual authority and governance. Its compliance relevance extends beyond the parties themselves, offering a reminder that robust controls need to remain in place throughout the entire contractual lifecycle — from procurement and award to renegotiation, settlement and dispute resolution.