One of the most important instruments of trade facilitation is the commodity nomenclature, which provides a definition of all goods subject to foreign trade. The correct classification of goods forms the basis for determining the appropriate value of a good and for determining the customs duties imposed on a good on import or export. Customs statistics on foreign trade are derived from it, and those statistics in turn serve as a tool for the determination and implementation of customs policy. Commodity nomenclature is used not only at the national level, but also by the World Trade Organization, the World Customs Organization, the United Nations, and other international entities. Importers and exporters or investors in other countries visit customs nomenclature websites thousands of times a day to see the types and levels of customs duties and other charges and trade policy measures that particular countries apply. Trade policy regulations, rules of origin, and trade statistics in almost all of the developed and developing countries are designed and compiled on the basis of customs nomenclatures. This SmartLesson discusses how the Central Asia Trade Logistics Project worked with the Customs Administration of the Republic of Tajikistan on the development of its first national commodity nomenclature.