Sentence:  <WSD>Cumulation</WSD> is a deviation from the principle that goods must be produced entirely in the country of exportation, or have undergone sufficient working or processing there, in order to qualify as originating goods. <WSD>Cumulation</WSD> makes it possible for goods from a free trade partner to be treated the same as those originating in the country of exportation. 
Meaning of the word marked with <WSD> tags:  The effect of free trade agreements on the rules of origin in calculating importation tariffs, quotas, etc.