It is based on and incorporates recommendations and standards of the Economic Commission for Europe (ECE) and the World Customs Organization (WCO), including those related to the Document Layout Key, codes and other standards.
它基于并吸收了欧洲经济委员会（欧洲经委会）和世界海关组织有关建议和标准，其中包括与单据统一格式和代码相关的标准以及其他标准。