The Harmonized Schedule (HS) is used to specify tariff classifications in Argentina. The HS was implemented on January 1, 1992 and is aligned with the WTO Customs Classification Code adopted in 1979. On January 1, 1995, Argentina implemented the MERCOSUR Common Nomenclature, known as the Nomenclatura Común del MERCOSUR (NCM), which is consistent with the U.S. Harmonized System for tariff classification.