| WCO | WCO | World Customs Organization: a very comprehensive site |
| European Commission | European Commission | DG XXI: Customs and Excise |
| Canada | Canada | Note: |
| France | France | the WCO site has links to many more |
| Germany | Germany | national customs authorities. |
| Italy | Italy | |
| Japan | Japan | |
| United Kingdom | United Kingdom | |
| USA | USA |
| Kyoto | Kyoto | Note: see also the WCO site |
| APEC | APEC | Asia Pacific Economic Cooperation |
| NAFTA | NAFTA | North American Free Trade Area |