Nullification, in United States constitutional history, is a legal theory that a state has the right to nullify, or invalidate, any federal law which that state has deemed unconstitutional with respect to the United States Constitution (as opposed to the state's own constitution ). The theory of nullification has never been legally upheld by federal courts.
Non-violation nullification of benefits (NVNB) claims are a species of dispute settlement in the World Trade Organization arising under World Trade Organization multilateral and bilateral trade agreements. NVNB claims are controversial in that they are widely perceived to promote the social vices of unpredictability and uncertainty in international trade law. Other commentators have described NVNB claims as potentially inserting corporate competition policy into the World Trade Organization Dispute Settlement Understanding (DSU).
The Ordinance of Nullification declared the Tariffs of 1828 and 1832 null and void within the state borders of South Carolina, beginning on February 1, 1833. It began the Nullification Crisis. Passed by a state convention on November 26, 1832, it led to President Andrew Jackson's proclamation against South Carolina, the Nullification Proclamation on December 10, 1832, which threatened to send government ground troops to enforce the tariffs. In the face of the military threat, and following a Congressional revision of the law which lowered the tariff, South Carolina repealed the ordinance.