世界海关组织创立的初衷就是达成海关领域的国际合作

One of the objectives of the World Customs Organization (formerly established as the Customs Co-operation Council) and the WTO Agreement on Trade Facilitation (TFA) is to formulate provisions, standards and best practices for effective cooperation between Customs or any other appropriate authorities on trade facilitation and Customs compliance issues. The other objective is to clarify and improve relevant aspects of Articles V, VIII and X of the GATT 1994, and to enhance technical assistance and support for capacity building in the area of trade facilitation.

Customs cooperation at the international level aims at improving control of trade flows and the enforcement of applicable laws and regulations through the exchange of information on Customs aspects such as export and import declaration data, trader-related information, origin and valuation-related information. Such data exchanges are now a key element in the WTO TFA and Article 12 of the TFA addresses all necessary components for such information exchanges such as the need for the requesting country to verify its request, to protect the data exchanged and ensure the confidentiality of the data and that such data exchanges are based on the principle of reciprocity. The WTO TFA also refers to bilateral and regional mutual administrative assistance agreements, which are still the main instrument for governments and Customs administrations to engage in such cooperation. Customs cooperation also takes place at the international level through the World Customs Organization by establishing international Customs standards and harmonized procedures and by providing training and technical assistance to build the capacity of Customs to use these new instruments.

Customs cooperation and mutual administrative assistance can play an important role in facilitating trade, as they are a major control element enabling Customs administrations to apply international settlements such as the WTO Valuation Agreement or the Agreement on the Rules of Origin.
https://tfig.unece.org/contents/custom-cooperation.htm
海关合作
世界海关组织（前身为海关合作理事会）和世贸组织贸易便利化协议（TFA）的目标之一是制定规定、标准和最佳做法，以便海关或任何其他适当的当局就贸易便利化和海关合规问题进行有效合作。另一个目标是澄清和改进1994年《关贸总协定》第V、VIII和X条的相关内容，并加强对贸易便利化领域能力建设的技术援助和支持。

国际层面的海关合作旨在通过交流海关方面的信息，如进出口申报数据、贸易商相关信息、原产地和估价相关信息，改善对贸易流动的控制和适用法律和法规的执行。这种数据交换现在是WTO《贸易协定》的一个关键要素，《贸易协定》第12条涉及这种信息交换的所有必要组成部分，如请求国需要核实其请求，保护所交换的数据并确保数据的保密性，以及这种数据交换是基于对等原则。世贸组织《贸易协定》还提到了双边和区域行政互助协定，这些协定仍然是政府和海关管理部门开展此类合作的主要工具。海关合作也通过世界海关组织在国际层面上进行，建立国际海关标准和统一程序，并提供培训和技术援助，以建设海关使用这些新工具的能力。

海关合作和行政互助可以在促进贸易方面发挥重要作用，因为它们是一个主要的控制因素，使海关当局能够适用国际结算，如世贸组织的估值协议或原产地规则协议。

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