On the recordOctober 13, 1952
Whenever in the judgment of the Tariff Commission conditions of competition with respect to the trade in the imported article and the like or directly competitive domestic product concerned have so changed as to warrant it, or upon request of the President, the Commission shall institute a formal investigation to determine whether, and, if so, to what extent, the withdrawal, suspension, or modification of a trade-agreement concession remains necessary in order to prevent or remedy serious injury or the threat thereof to the domestic industry concerned.
Source
presidency.ucsb.edu
