Organization of Islamic Cooperation (OIC) meaning

In legal practice, the Organisation of Islamic Cooperation (OIC) is encountered in treaty interpretation, development finance and diplomatic law. It is an intergovernmental organisation of 57 member states across four continents, often described as the second largest after the United Nations. Formerly the Organisation of the Islamic Conference, it is headquartered in Jeddah and has UN observer status. The term is not defined in UK or Irish legislation and is used descriptively across legal contexts. References arise in: (i) the 1981 Agreement on Promotion, Protection and Guarantee of Investments among OIC Member States (the OIC Investment Agreement), relied on in investor–state arbitration; (ii) financing with the Islamic Development Bank (IsDB), an OIC specialised institution; and (iii) recognition of privileges and immunities for OIC officials or missions where granted under host‑state arrangements. Resolutions of OIC organs are not binding in the UK or Ireland unless implemented domestically or via applicable international obligations. Usage is consistent across England & Wales, Scotland, Northern Ireland and Ireland. Practitioners should verify current membership and organ mandates when drafting definitions, assessing treaty protections for investors from OIC member states, or applying sanctions, export controls and KYC that group countries by participation in intergovernmental organisations.