The country of origin is one of the three core functions for the assessment of duty, along with tariff classification and valuation. The origin of a product determines its eligibility for NAFTA or other free trade agreements (FTAs) in addition to trade preference programs such as the Generalized System of Preferences (GSP) or other regional programs. In addition, the origin determines whether an imported product will be subject to antidumping or countervailing duty as well as eligibility for preferences in government procurement. Origin is critical to the application of labeling laws on imported products or their packaging. TCS can make the necessary calls when applying substantial transformation or tariff shift rules in determining the origin.