Conclusion of agreements by a subset of members of customs unions in Africa has made customs union &apos; s operation difficult (e.g. Southern Africa Customs Union).
En Afrique, les accords conclus par un sous-ensemble de membres d &apos; unions douanières ont rendu difficile le fonctionnement de certaines unions douanières (par exemple l &apos; Union douanière d &apos; Afrique australe).