The 21.5 AB ruling in Mexico – Corn Syrup arises out of a dispute between the United States and Mexico concerning whether the Mexican agency’s finding of material injury from dumping was consistent with the Anti-dumping Agreement. The original Panel1 found that the agency’s determination of the existence of a threat of material injury to the domestic industry was made in violation of numerous provisions of the Anti-dumping Agreement. In light of these findings by the panel, the agency made a redetermination and the United States filed a 21.5 complaint, claiming that the redetermination failed to address adequately the defects identified by the original panel.