| English | Dutch |
| Convention between Belgium, the Federal Republic of Germany, France, Italy, Luxembourg and the Netherlands on the Provision of Mutual Assistance by their Customs Authorities | Overeenkomst tussen België, de Bondsrepubliek Duitsland, Frankrijk, Italië, Luxemburg en Nederland inzake wederzijdse bijstand tussen de onderscheiden douaneadministraties |
| Convention between Belgium, the Federal Republic of Germany, France, Italy, Luxembourg and the Netherlands on the Provision of Mutual Assistance by their Customs Authorities | Overeenkomst van Napels |
| Convention between Belgium, the Federal Republic of Germany, France, Italy, Luxembourg and the Netherlands on the Provision of Mutual Assistance by their Customs Authorities | Napels I |
