Economic Community of Central African States
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At a summit meeting in December 1981, the leaders of the Central African Customs and Economic Union (UDEAC) agreed in principle to form a wider economic community of Central African states.
ECCAS was established on 18 October 1983 by the UDEAC members and the members of the Economic Community of the Great Lakes States (CEPGL) (Burundi, Rwanda and the then Zaire) as well as Sao Tomé and Principe. Angola remained an observer until 1999, when it became a full member.
IGRAC and ECCAS
IGRAC and ECCAS have both been involved in the groundwater component of the Transboundary Water Assessment Programme (TWAP), a project that involved the assessment of 199 transboundary aquifers and 43 Small Island Developing States.