The only Portuguese-speaking WAEMU state, and a member of OHADA and ECOWAS, Guinea-Bissau combines civil-law national legislation inherited from the Portuguese tradition, uniform OHADA law and WAEMU community law. This page sets out how they fit together, and which prevails in case of conflict.
Select an organization to see its members, or display overlaps with Guinea-Bissau. The map challenge offers six legal geography questions. The map is in French.
Guinea-Bissau at the crossroads of regional organizations
A member of six organizations, Guinea-Bissau is subject to complementary legal regimes: uniform business law (OHADA), economic and monetary union (WAEMU), regional integration (ECOWAS) and shared management of the Gambia and neighbouring rivers (OMVG).
OHADA
member state
Organization for the Harmonization of Business Law in Africa
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Seat
Yaoundé (Permanent Secretariat) · 17 Member states
Regulatory approach
Uniform Acts directly applicable without transposition: companies, securities, debt recovery, insolvency, arbitration, general commercial law.
Effect in Bissau-Guinean law
Supranationality: Uniform Acts apply notwithstanding any conflicting provision of domestic law, whether earlier or later (Treaty, art. 10).
Court
CCJA (Abidjan): court of cassation for the application of Uniform Acts, in place of the Supreme Court of Justice of Guinea-Bissau.
Legal data stakes
Foundation of the LegOmnia database under construction: CCJA case law and Bissau-Guinean decisions applying the Uniform Acts, available in Portuguese, one of the OHADA working languages.
WAEMU
member (since 1997)
West African Economic and Monetary Union
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Seat
Ouagadougou · 8 Member states
Regulatory approach
Directly applicable regulations and directives to be transposed; common competition policy; CFA franc issued by the BCEAO.
Effect in Bissau-Guinean law
Primacy of community law: regulations apply without any national transposition measure.
Court
WAEMU Court of Justice (Ouagadougou).
Legal data stakes
Regulations, directives and Commission decisions, notably on competition, taxation and banking law.
ECOWAS
founding member (1975)
Economic Community of West African States
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Seat
Abuja · 12 Member states
Regulatory approach
Revised Treaty, protocols (free movement, trade) and supplementary acts adopted by the community bodies.
Effect in Bissau-Guinean law
Ratified treaties and protocols prevail over statutes (Constitution), subject to reciprocity.
Court
ECOWAS Court of Justice (Abuja), directly accessible to individuals in human rights matters.
Legal data stakes
Case law of the ECOWAS Court, notably on human rights, and free movement texts.
AU
founding member of the OAU (1963)
African Union
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Seat
Addis Ababa · 55 Member states
Regulatory approach
Constitutive Act and continental conventions (human rights, cybersecurity, data protection), applicable after signature and ratification.
Effect in Bissau-Guinean law
Ratified and published conventions prevail over statutes (Constitution), subject to reciprocity.
Court
African Court on Human and Peoples' Rights (Arusha), within the limits of the ratified protocols.
Legal data stakes
Reference for continental standards, notably on personal data protection.
AfCFTA
State party to the Agreement
African Continental Free Trade Area
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Seat
Accra (Secretariat) · 54 Member states
Regulatory approach
Framework agreement and protocols: goods, services, investment, competition, intellectual property, digital trade.
Effect in Bissau-Guinean law
In case of conflict with a regional agreement, the Agreement prevails, except between states that have achieved deeper integration (art. 19), as within WAEMU.
Court
State-to-state dispute settlement mechanism modelled on the WTO.
Legal data stakes
Monitoring of trade commitments and national implementing texts.
OMVG
member state
Gambia River Basin Development Organization
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Seat
Dakar · 4 Member states
Regulatory approach
Joint management of the Gambia and neighbouring river basins: energy, power interconnection, development works.
Effect in Bissau-Guinean law
Conventions subject to the general treaty regime (Constitution).
Court
No community court.
Legal data stakes
Basin conventions and texts on shared infrastructure and energy.
Common pitfalls: Guinea-Bissau is not a member
CEMAC : Economic and monetary union of six Central African states. It also uses a CFA franc, but one issued by the BEAC: Guinea-Bissau belongs to WAEMU and the BCEAO.
WAMZ : West African Monetary Zone, bringing together six ECOWAS states outside the CFA franc, including neighbouring Guinea. Guinea-Bissau is not a member: it uses the CFA franc.
OMVS : Senegal River Basin Development Organization, to be distinguished from the OMVG, of which Guinea-Bissau is a member.
OHADA and WAEMU: how they fit together
The eight WAEMU member states, including Guinea-Bissau, also belong to OHADA. Two bodies of community law therefore apply there at the same time, with distinct scopes but points of contact.
Complementarity
OHADA focuses strictly on legal certainty for business and commercial law, while WAEMU has a broader remit: monetary policy, customs union, financial markets, taxation.
Coexistence and conflicts of norms
In the eight countries belonging to both organizations, collisions can arise between OHADA Uniform Acts and WAEMU regulations or directives, for example in accounting or financial law.
A permanent consultation framework
To avoid conflicts of competence and harmonise their action, a Permanent Consultation Framework has been set up between OHADA and the WAEMU institutions.
The Bissau-Guinean legal order has five levels. OHADA law and WAEMU law hold a special place: directly applicable, they prevail even over a later statute.
Level 1 · supreme norm
Constitution
The Constitution of 1984, amended several times, sits at the top of the legal order.
Legal basis : ConstitutionGuardian : Supreme Court of Justice
Level 2 · supranational
OHADA and WAEMU law
OHADA Uniform Acts and WAEMU regulations are directly applicable and prevail over any conflicting provision of domestic law, whether earlier or later. WAEMU directives, by contrast, must be transposed.
AU, AfCFTA, ECOWAS, OMVG: duly ratified and published treaties prevail over statutes, subject to reciprocity.
Legal basis : Constitution, provisions on treatiesGuardian : National and community courts
Level 4 · legislative
Statutes and ordinances
Organic laws, ordinary laws and ordinances. They must comply with the Constitution and yield to ratified treaties and community law.
Legal basis : Constitution, scope of statute lawGuardian : Supreme Court of Justice, ordinary courts
Level 5 · regulatory
Decrees, orders, local authority acts
Acts of the executive and local authorities, adopted in compliance with statutes. An unlawful regulatory act can be annulled.
Legal basis : Principle of legalityGuardian : administrative courts, Supreme Court of Justice
What about case law? It does not appear in the pyramid, but it shows how each level applies in practice. That is precisely the body of law LegOmnia is working to structure and make accessible.
Test your knowledge
Two interactive exercises: resolve real conflicts between norms, then check what you know about Guinea-Bissau's regional integration.
The norms referee
Score : 0
Case 1/6
A WAEMU regulation on external financial relations conflicts with a national statute.
Which norm or court prevails?
Quiz: regional integration
Score : 0
Question 1/15
Which of these is NOT a working language of OHADA?
Frequently asked questions about Bissau-Guinean law
Is Guinea-Bissau a member of CEMAC?
No. Guinea-Bissau is a member of WAEMU (West African Economic and Monetary Union), whose CFA franc (XOF) is issued by the BCEAO, headquartered in Dakar. CEMAC brings together six Central African states, whose CFA franc (XAF) is issued by a different central bank, the BEAC.
Does OHADA law apply in Guinea-Bissau?
Yes. Guinea-Bissau is a member of OHADA. The Uniform Acts are directly applicable there without transposition, notwithstanding any conflicting provision of domestic law, whether earlier or later (OHADA Treaty, art. 10).
Which court rules in cassation on OHADA law?
The Common Court of Justice and Arbitration (CCJA), based in Abidjan. It rules in cassation on the application of the Uniform Acts, in place of the Supreme Court of Justice of Guinea-Bissau (Treaty, art. 14), and its judgments are enforceable in all member states (art. 20).
Is OHADA law available in Portuguese?
Yes. Since the revision of the OHADA Treaty in 2008, OHADA's working languages are French, English, Spanish and Portuguese, which allows Uniform Acts to be published in Portuguese for Guinea-Bissau.
Which regional organizations does Guinea-Bissau belong to?
Guinea-Bissau is a member of six organizations: the African Union, the AfCFTA, OHADA, ECOWAS, WAEMU and the OMVG. It is not a member of CEMAC, the WAMZ or the OMVS.
Where does LegOmnia stand on Bissau-Guinean law?
This is one of our priority jurisdictions and its integration is under way. We are building coverage step by step: OHADA law, shared by the 17 member states, is the foundation, progressively enriched with texts and case law specific to Bissau-Guinean law. People on the waitlist will be the first to hear about each new milestone. OmniScan can already be deployed there today to digitise and index legal document collections.
Bissau-Guinean law, soon at your fingertips
Join the waitlist to be among the first to access LegOmnia legal research on Guinea-Bissau and the OHADA area.
Educational summary; it does not constitute legal advice. References: Constitution of the Republic of Guinea-Bissau, OHADA Treaty (arts. 10, 14, 20), WAEMU Treaty, AfCFTA Agreement (art. 19). Memberships as of October 2026.
Jurisdiction · West Africa