A full treaty revision was needed because Belgium, France, Germany, Italy, and Luxembourg wanted to add a protocol on the import of refined petroleum products from the Netherlands Antilles.

[4] A Declaration of Intent on the association of Surinam and the Netherlands Antilles with the European Economic Community, however, was attached to the Final Act of the Intergovernmental Conference for the Common Market and EURATOM: The governments of the Kingdom of Belgium, the Federal Republic of Germany, the French Republic, the Italian Republic, the Grand Duchy of Luxembourg and the Kingdom of the Netherlands, Taking into consideration the close ties which unite the several parts of the Kingdom of the Netherlands, Anxious to maintain and intensify the traditional trade flows between the Member States of the European Economic Community on the one hand and Surinam and the Netherlands Antilles on the other, and to contribute to the economic and social development of these countries, Declare their readiness, as soon as this Treaty enters into force, to open negotiations at the request of the Kingdom of the Netherlands, with a view to concluding conventions for the economic association of Surinam and the Netherlands Antilles with the Community.Suriname became already associated with the European Economic Community on 1 September 1962, by virtue of a Supplementary Act completing the instrument of ratification of the Kingdom of the Netherlands.

[2] Applying the treaty to the Netherlands Antilles by Supplementary Act to the instrument of ratification turned out to be an impossibility, as the other five Member States of the Community wanted some safeguards with regard to the import of petroleum products refined in the islands,[1] and thus a full treaty revision according to Article 236 of the EEC Treaty had to be negotiated.

The actual Convention consists of four articles, the first of which establishes that the Netherlands Antilles shall be added to the list in Annex IV of the Treaty establishing the European Economic Community (now Annex II).

The treaty entered into force on 1 October 1964, the first day of the month following the date of deposit of the last instrument of ratification by a signatory state, in this case Italy: