A draft EPC treaty, as drawn up by the ECSC assembly (now the European Parliament), would have seen a directly elected assembly ("the Peoples’ Chamber"), a senate appointed by national parliaments and a supranational executive accountable to the parliament.
Návrh zmluvy o EPS, ktorí vypracovalo Zhromaždenie ESUO (dnes Európsky parlament), predpokladal priamo volený parlament ("Komoru národov"), senát ustanovovaný národnými parlamentmi a nadnárodnú exekutívu zodpovednú parlamentu.