The Harmonized System (HS) is the standardized coding system of names and numbers used in international trade. Over 200 countries representing about 98 percent of world trade use the HS as a basis for customs tariffs and the compilation of international trade data and statistics. HS compliance refers to the mandatory proper classification and declaration of goods coming into or leaving Canada. As an importer or exporter, you are responsible for the correct declaration of your goods. ARGO Customs Brokers can advise you the proper HS code, our consultations are free.