The three bodies, collectively named the European Executives, co-existed until 1 July 1967 when, under the Merger Treaty, they were combined into a single administration under President Jean Rey.
Cele trei organisme, denumite colectiv Executivele Europene, au co-existat până la 1 iulie 1967 când Tratatul de fuziune le-a combinat într-o singură administrație sub președinția lui Jean Rey.