This conference was held between November 21, 1947 and March 24, 1948 in Havana Cuba also known as the Havana Charter and probably one of the many attempts in the modern era to harmonize Customs valuation systems.
- During this conference a consensus was reached and signed by fifty-three countries.
- The Customs valuation principle adopted by the conference was that Customs Valuation should be based on transaction value to the greatest extent possible and should not be based on the value of merchandise of national origin or on arbitrary or fictitious values.
- When the actual value is not ascertainable in accordance with the aforementioned, the value for customs purposes should be based on the nearest ascertainable equivalent of such value.
- The Havana charter which had sought to create an International Trade Organization however failed to come into force.