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Governments, multinational corporations, international organisations, development agencies and investors increasingly operate across multiple legal systems. Our Public International Law team helps clients navigate international treaties, sovereign matters, cross-border regulation, investment protection, international trade and diplomatic legal frameworks with practical, commercially informed advice.
A working explanation of the field for boards, ministries and in-house counsel — what the rules are, where they come from, and when they change how a decision should be made.
Public international law is the legal framework that governs relations between States, and between States and international organisations. It determines how countries make binding commitments to one another, what happens when those commitments are broken, and how far a State’s authority extends beyond its own borders. For a government, it shapes what may lawfully be agreed. For a business, it shapes the conditions under which capital, goods, people and data may cross a frontier.
Clients often first encounter the subject indirectly: a lender asks for an opinion on whether a ministry had authority to sign; a shipment is held because of an export control measure; a regulator introduces a rule that conflicts with an earlier concession; a foreign partner insists on arbitration in a neutral seat. Each of these is a public international law question wearing commercial clothing.
The two are frequently confused. Public international law governs the rights and obligations of States and international organisations — treaties, State responsibility, immunity, diplomatic relations, the law of the sea, human rights and international trade disciplines. Private international law, also called conflict of laws, answers a narrower set of questions in disputes between private parties: which court has jurisdiction, which national law applies to the contract, and whether a foreign judgment or arbitral award will be recognised and enforced.
In practice a single project raises both. A concession granted by a Sudanese ministry to a foreign developer may be protected by an investment treaty (public international law) while the construction subcontracts are governed by a chosen national law with disputes referred to arbitration (private international law). Advice that addresses only one half leaves the other exposed.
The sources of international law are conventionally those listed in Article 38 of the Statute of the International Court of Justice. They are worth understanding because they explain why some obligations are negotiable and others are not.
When a State breaches an international obligation, the law of State responsibility determines the consequences. Two questions dominate. The first is attribution: whose conduct counts as the State’s? The acts of ministries, regulators, courts, the police and, in defined circumstances, State-owned enterprises exercising governmental authority may all be attributed to the State. The second is remedy: the State must cease the breach and make full reparation, ordinarily by compensation reflecting the loss actually caused. Defences such as necessity and force majeure exist but are interpreted strictly.
Sovereign immunity protects a State from being sued in the courts of another State. Most jurisdictions now apply a restrictive doctrine, distinguishing sovereign acts from commercial activity, with immunity available only for the former. Critically, immunity from jurisdiction and immunity from execution are separate: a claimant may obtain a judgment or award and still be unable to enforce it against embassy, military or central bank assets. Immunity can be waived, and a properly drafted, express waiver covering both jurisdiction and execution is a standard requirement in sovereign lending and public contracts.
International organisations have legal personality distinct from their member States and generally enjoy privileges and immunities under their constituent instruments and host-country agreements. This affects everything from how they may be contracted with, to how staff disputes are resolved, to whether local courts may hear a claim against them. Counterparties in Sudan working with United Nations agencies, multilateral banks or regional bodies need to know where those immunities begin and end before signing.
Two areas dominate commercial practice. Investment protection derives largely from bilateral and multilateral investment treaties, which give qualifying foreign investors directly enforceable rights against a host State — including protection against unlawful expropriation and against treatment that is arbitrary or fundamentally unfair. International trade is shaped by WTO disciplines, regional arrangements such as COMESA and the AfCFTA, and the increasingly influential layer of sanctions and export controls applied by the United Nations, the United States, the European Union and the United Kingdom.
Governments carry the corresponding obligations. A State must implement the treaties it ratifies, honour undertakings given to investors and lenders, and ensure that new regulation does not breach commitments already made. Where policy must change, the manner and timing of that change often determine whether the State faces a claim.
Because the decisive moments almost always come early. Treaty protection depends on how an investment was structured before it was made. Sanctions exposure depends on a counterparty’s ownership chain, not its name. Enforcement depends on the wording of a clause agreed years earlier. An adviser who understands both the international framework and how Sudanese institutions apply it can identify these points while they are still choices — rather than after they have become facts.
Each category of client faces a distinct set of international legal pressures. The summaries below reflect the issues we are most often asked to address.
Treaty negotiation and ratification, sovereign obligations, immunity questions and the legal consequences of regulatory reform for existing international commitments.
Acting commercially while remaining an emanation of the State — attribution risk, procurement rules and the loss of immunity in commercial transactions.
Privileges and immunities, headquarters and host-country agreements, contracting with local counterparties and staff arrangements under internal law.
Registration and operating permissions, donor conditions, sanctions and counter-terrorism financing screening, and the protection of personnel and assets.
Legal opinions on sovereign capacity and enforceability, environmental and social conditionality, and remedies where a State counterparty defaults.
Structuring to access treaty protection, entry approvals, guarantees against expropriation and unfair treatment, and preserving arbitration rights.
Group-wide compliance across overlapping regimes, intra-group contracting, transfer of funds and the extraterritorial reach of foreign law.
Classification and licensing, rules of origin, documentary credits, Incoterms allocation of risk and restricted-party screening.
Customs valuation and tariff treatment, standards and conformity requirements, import permits and duties relief under trade arrangements.
Vienna Convention entitlements, premises and property arrangements, locally engaged staff and the boundary between official and commercial acts.
Concessions, production sharing and joint operating agreements, stabilisation clauses, decommissioning liabilities and cross-border resource issues.
Long-tenor concessions and PPPs, government support undertakings, change-in-law protection and bankability of the risk allocation.
Correspondent banking constraints, sanctions and AML obligations, security over cross-border assets and enforcement against sovereign entities.
Export controls on dual-use technology, cross-border data transfers, localisation requirements and licensing across multiple regulators.
Permanent establishment and permitting, FIDIC-based public works contracts, bonds and guarantees, and claims against public employers.
Twenty areas of advisory work, from treaty drafting and sovereign advice to sanctions screening and reasoned legal opinions for lenders and investors.
Advice on the negotiation, drafting, interpretation and domestic implementation of bilateral and multilateral treaties, including reservations and entry into force.
Commitments are recorded precisely, so obligations are known before they bind and implementation gaps are identified early.
Host-government agreements, concessions and investment contracts, including legislation, dispute resolution and governing law provisions.
The commercial bargain is made legally durable across changes of policy, administration and market conditions.
Analysis of treaty coverage, qualifying investor and investment definitions, substantive standards of protection and consent to arbitration.
Investment structures are assessed against available treaty protection before capital is committed.
Support to ministries, regulators and public institutions on international obligations, legislative drafting and negotiation strategy.
Public bodies negotiate from an informed position, with international precedent and comparative practice in view.
WTO-based disciplines, tariff and non-tariff measures, rules of origin, regional trade arrangements including COMESA and AfCFTA, and trade remedies.
Trade flows are structured for lawful, predictable market access and duty treatment.
Multi-jurisdictional acquisitions, joint ventures and supply arrangements, including conflicts of law, approvals and closing mechanics.
Transactions close on time because regulatory and jurisdictional conditions are mapped from the outset.
Assessment of UN, US, EU and UK measures, counterparty and ownership screening, licence applications and internal compliance frameworks.
Exposure is identified before a transaction proceeds, protecting banking relationships and market access.
Advice on foreign exchange controls, investment screening, competition clearance and sectoral licensing affecting cross-border activity.
Regulatory conditions are satisfied in the correct sequence, avoiding void transactions and enforcement action.
Distribution, agency, supply, EPC and services agreements with cross-border performance, including choice of law and arbitration clauses.
Contracts remain enforceable and disputes are resolved in a forum the parties actually intended.
State responsibility, sovereign immunity from jurisdiction and execution, sovereign guarantees and the international law of State succession.
Sovereign parties and their counterparties understand precisely where immunity applies and where it does not.
Vienna Conventions on Diplomatic and Consular Relations, mission premises, privileges and immunities, and locally engaged personnel.
Missions operate within their entitlements while meeting local legal requirements without friction.
Host-country and headquarters agreements, procurement and grant frameworks, internal justice systems and implementing partner arrangements.
Programmes are delivered on a sound legal footing with immunities and local obligations correctly reconciled.
State reporting obligations, business and human rights standards including the UN Guiding Principles, and human-rights due diligence.
Operational and reputational risk is assessed against the standards lenders and counterparties now expect.
Anti-bribery, anti-money laundering and export control regimes with extraterritorial effect, and the design of proportionate controls.
One coherent compliance framework satisfies several regulators instead of several conflicting ones.
Donor and multilateral procurement rules, tender documentation, eligibility and debarment questions, and bid challenges.
Bids are compliant and defensible, and irregularities in an award process can be addressed promptly.
Public-private partnerships, concessions and government-supported infrastructure, from feasibility through to financial close.
Risk sits with the party best able to manage it, which is what makes a project financeable.
Structured legal risk reviews covering political risk, treaty coverage, sanctions, enforcement and jurisdictional exposure.
Boards and investment committees receive a clear written basis for their decisions.
Structuring for treaty coverage, political risk insurance, contractual protection and the preservation of claims.
Protection is in place before a dispute arises, when it can still be created rather than only argued.
Preparation and conduct of negotiations with ministries, regulators and State entities, including term sheets and MOUs.
Negotiations progress on a documented basis, with the legal effect of each instrument understood.
Reasoned opinions on capacity, authority, enforceability, immunity and compliance for lenders, investors and counterparties.
Financings and transactions satisfy conditions precedent with opinions lenders can rely on.
Cross-border investment is exposed to a risk that domestic investment is not: the counterparty may also be the regulator. Investment protection law exists to address that asymmetry, and it works best when it is arranged before capital is committed rather than after a problem emerges.
Investment treaties. Bilateral investment treaties and the investment chapters of trade agreements are concluded between States but confer rights on qualifying investors of each State. Whether an investor qualifies depends on nationality, on the definition of a covered investment, and on any denial-of-benefits clause. This is why holding structure matters: an investment routed through a State with no treaty in force with the host State may have no treaty protection at all.
Standards of investor protection. Treaties typically guarantee fair and equitable treatment, full protection and security, national and most-favoured-nation treatment, protection against direct and indirect expropriation without prompt and adequate compensation, and the free transfer of funds. Fair and equitable treatment is the most frequently invoked: it protects against arbitrary, discriminatory or grossly unfair conduct and against the frustration of legitimate expectations created by specific assurances.
Government obligations and regulatory stability. A State retains the right to regulate in the public interest. What treaties discipline is the manner of regulation — whether it is transparent, applied consistently, preceded by due process, and free of measures that destroy the value of an investment without compensation. Stabilisation clauses in host government agreements can allocate the cost of a change in law, and are commonly negotiated in long-tenor energy, mining and infrastructure projects.
Political risk. Political risk is broader than expropriation. It includes currency inconvertibility and transfer restrictions, breach of a government undertaking, war and civil disturbance, and the withdrawal of licences. Legal protection is one layer; political risk insurance from a national export credit agency or a multilateral guarantee agency is another. The two should be designed together, because insurers ask what contractual and treaty protection exists.
Due diligence and structuring. Legal due diligence establishes title, licences, permits, land rights, tax position, existing disputes and the authority of the public body granting the rights. It should extend to whether the ministry or agency signing has the capacity to bind the State, since a contract concluded outside that authority may be unenforceable. Structuring then selects the jurisdiction of the holding entity, the financing route and the contractual protections that together determine the remedies available later.
Dispute prevention. Most investment disputes escalate from administrative friction that could have been managed: delayed permits, unpaid invoices, disputed tax assessments. Recording correspondence, escalating through the agreed contractual mechanism, observing notice and cooling-off periods, and engaging early with the relevant ministry resolve a substantial proportion of matters before any claim is filed. Where a claim becomes unavoidable, those same steps preserve the right to bring it.
International financing. Development finance institutions and commercial lenders conduct their own review before disbursement, requiring legal opinions on capacity, authority, enforceability and security, and compliance with environmental, social and anti-corruption conditions. Preparing for that review at the outset shortens the path to financial close.
We advise investors on securing these protections and public bodies on granting them in a manner consistent with the State’s international obligations. We do not predict outcomes; we identify the protections available and the steps required to preserve them.
Cross-border commerce fails on detail more often than on strategy — a misclassification, a missing licence, an unscreened counterparty. The following summarises the areas where we are most often asked to intervene.
Cross-border sale, distribution, agency and services agreements should state their governing law, dispute forum and Incoterms rule explicitly. Silence is resolved by conflict-of-laws rules that may point to an unexpected system, and inconsistent clauses across a contract suite invite parallel proceedings.
Goods, software and technology may be controlled by reason of their specification, destination, end user or intended use. Dual-use items require particular care, and controls can follow a product through re-export. Classification should be settled before an order is accepted, not before shipment.
Customs valuation, tariff classification and rules of origin determine duty. Standards, conformity assessment, labelling and sector permits determine admissibility. Errors here are recoverable, but usually only through demurrage, penalties and delay.
Bills of lading, certificates of origin, inspection certificates and letters of credit carry legal consequences of their own. Under documentary credits, banks examine documents rather than goods, so a discrepancy in paperwork can defeat payment on a perfectly performed contract.
Many activities in Sudan require sectoral licences, registration with the relevant authority, or ministerial approval. Sequencing matters: an approval obtained after an agreement has been signed may not validate steps already taken.
Entry may require investment registration, company formation with permitted foreign shareholding, land or concession rights and foreign exchange arrangements. Conditions attached to an approval are enforceable and should be diarised and monitored.
United Nations, United States, European Union and United Kingdom measures differ in scope and may apply extraterritorially. Ownership and control tests mean a permitted counterparty can become restricted through a shareholder. Screening must be repeated, not performed once at onboarding.
A workable framework assigns responsibility, sets escalation thresholds, records decisions and trains the people who actually make them. Regulators and banks increasingly assess the quality of the framework, not merely the absence of a breach.
Obligations now extend beyond the immediate counterparty to forced labour, origin and environmental standards further up the chain. Contractual flow-down provisions and audit rights are the practical means of managing exposure you do not directly control.
Currency and transfer restrictions, payment default, force majeure and port disruption should be allocated expressly. Where risk cannot be allocated away, it can often be mitigated through credit support, insurance or staged performance.
More than two decades advising on international and cross-border matters in Sudan gives our advice institutional memory — how ministries work, how policy has shifted, and how earlier agreements were performed.
We work with the legal systems, regulators and commercial customs of Sudan and the wider Africa and Middle East region, so advice reflects how rules are actually applied, not only how they are written.
Our work is grounded in treaty practice, arbitral jurisprudence and the standards applied by multilateral institutions, allowing us to align local execution with international expectations.
Advice is written for decision-makers. We set out the legal position, the practical options and the consequences of each, rather than restating the law without direction.
We coordinate multi-jurisdictional workstreams — approvals, financing, tax and corporate steps — so conditions are satisfied in the right order and closing is not delayed.
We are accustomed to the procedural requirements, approval chains and public-law constraints that govern how State institutions may contract and commit.
Where a route is closed, we look for a lawful alternative: a different structure, a licence application, a renegotiated term, or a staged approach that keeps the project moving.
Most of our international work comes from clients we have advised for years. Continuity means faster advice and fewer avoidable disputes.
The exposures most frequently identified in cross-border reviews. Each is manageable, but generally only before the transaction is signed.
Measures reach counterparties, vessels, banks and ownership chains. Exposure often arises indirectly, through an intermediary or a shareholder rather than the contracting party itself.
Changes in government, conflict and shifts in policy can affect permits, payment and the security of assets. Treaty and insurance protection must be arranged before instability, not during it.
New licensing, tax, foreign exchange or localisation rules can alter project economics. Stabilisation and change-in-law provisions determine who carries that cost.
Whether an investor or investment qualifies for protection turns on definitions, denial-of-benefits clauses and timing. These questions are decided long before any dispute begins.
Export controls, import bans, quotas and documentary requirements can halt shipments in transit and trigger contractual liability down the supply chain.
Inconsistent governing law, jurisdiction and dispute clauses across a contract suite produce parallel proceedings and inconsistent outcomes.
Notice periods, cooling-off requirements and fork-in-the-road clauses can extinguish rights. Early procedural steps frequently determine whether a claim can be brought at all.
Eligibility, conflict of interest and debarment rules apply to donor and public tenders. Non-compliance can invalidate an award or exclude a bidder from future rounds.
A favourable award has limited value without assets to enforce against. Immunity from execution and recognition regimes must be considered at the drafting stage.
Anti-bribery, AML and reporting breaches carry extraterritorial consequences, including loss of banking access. Documented controls are as important as the underlying conduct.
Answers to the questions clients ask most often. They are general information and not advice on any particular matter.
Public international law is the body of rules governing relations between States, and between States and international organisations. Its sources are treaties, customary international law formed by consistent State practice accepted as law, and general principles recognised by legal systems, supplemented by judicial decisions and scholarly writing. It regulates matters such as treaty obligations, State responsibility, sovereign immunity, diplomatic relations, the use of force, human rights and international trade. It matters to private parties because States implement these obligations through domestic law and because investors and traders may benefit directly from treaty protections.
Public international law governs the rights and duties of States and international organisations. Private international law, or conflict of laws, determines which national court hears a cross-border dispute, which national law applies, and whether a foreign judgment or award will be recognised. A cross-border project typically raises both: an investment treaty question is public international law, while the governing law of the supply contract is private international law. The two interact — for instance where a treaty obliges a State to recognise arbitration agreements applied by its domestic courts.
Treaties bind States, but they shape the environment businesses operate in. Trade agreements set tariffs and market access, investment treaties grant enforceable protections to qualifying investors, tax treaties allocate taxing rights, and conventions such as the New York Convention make arbitral awards enforceable across borders. Whether a treaty can be relied on directly in national courts depends on how that State gives treaties domestic effect. The practical question for a business is usually whether it is structured so as to fall within the treaty’s scope.
A Bilateral Investment Treaty is an agreement between two States to protect investments made by nationals of one State in the territory of the other. Typical protections include fair and equitable treatment, protection against unlawful expropriation without compensation, national and most-favoured-nation treatment, full protection and security, and free transfer of funds. Most contain the host State’s consent to international arbitration, allowing an investor to bring a claim directly against the State. Coverage depends on the definitions of investor and investment, so the corporate structure through which an investment is held is decisive.
Sovereign immunity is the principle that a State is not subject to the jurisdiction of another State’s courts. Most jurisdictions apply a restrictive doctrine: immunity applies to sovereign acts, but not to commercial activity. Immunity from jurisdiction is separate from immunity from execution, which protects State assets from enforcement and is generally harder to overcome; diplomatic, military and central bank assets are usually protected. Immunity can be waived, and a clear, express waiver covering both jurisdiction and execution is standard in sovereign financing and commercial contracts.
Sanctions may target States, sectors, entities or individuals, and may restrict trade, finance, shipping or technology. Regimes imposed by the United Nations, United States, European Union and United Kingdom differ in scope and can apply extraterritorially through nationality, currency or the origin of goods. Practical compliance requires counterparty and ownership screening, review of the goods and end use, contractual protections and, where appropriate, licence applications. Because banks apply their own risk thresholds, a transaction can be commercially impossible even where it is technically permitted.
Foreign investment in Sudan is subject to the investment and sectoral legislation in force at the relevant time, together with company registration, licensing, foreign exchange and, in some sectors, land and concession requirements. Some activities require specific ministerial or regulatory approval, and applicable international measures must also be considered. Because these frameworks change, current legal verification is essential before committing capital, and we advise on the position as it stands at the time of instruction rather than on general assumptions.
State-to-State disputes may go to the International Court of Justice, an arbitral tribunal, or a specialised mechanism such as WTO dispute settlement. Investor-State disputes are usually resolved by arbitration under ICSID or UNCITRAL rules where a treaty or contract provides consent. Commercial disputes between private parties are commonly resolved by institutional arbitration under rules such as those of the ICC or LCIA, with awards enforceable under the New York Convention. Many matters are resolved earlier through negotiation, mediation or an agreed cooling-off period.
International agreements can create long-term obligations that constrain future policy and expose the State to claims. Advice before signature addresses capacity and authority to bind the State, consistency with existing treaties and domestic law, the scope of any dispute resolution consent, the effect of stabilisation and immunity waivers, and the ratification and implementation steps required. Amending or exiting an agreement afterwards is considerably harder, and the cost of clarifying terms in advance is far lower than the cost of arbitrating them later.
Abdeen & Co. has more than 23 years advising clients in Sudan and across Africa and the Middle East on complex cross-border matters. Our Public International Law team combines treaty and sovereign advisory experience with practical knowledge of how Sudanese institutions and regulators operate. We act for governments, public institutions, international organisations, development finance institutions, investors and multinational businesses, and we advise as long-term counsel rather than as litigators of first resort. We do not guarantee outcomes; we give clear, reasoned advice on the position and the realistic options.
Whether you are advising a government, expanding internationally, negotiating cross-border agreements or managing investment risk, our Public International Law team provides practical legal guidance grounded in international best practice and local legal knowledge.
Abdeen&Co is committed to delivering exceptional legal services tailored to the unique needs of each client. With a focus on practical solutions and industry expertise, we strive to exceed expectations and drive success in every endeavor.