The instrument establishing the Economic Community of West African State in 1975 is? by Sunday | Dec 20 | Commerce WAEC | 0 comments A. a decree B. an act C. a treaty D. constitution Correct Answer: Option C – a treaty Users Also Read These:The Economic Community of West African States…The Administrative Headquarters of the Economic…The following are benefits member countries derive…Under the chairmanship of _______ the Economic…The treaty establishing ECOWAS on May 28, 1975 was…