Anti-dumping duty on caustic soda established, calculated as the difference between reference amount and landed value. Imposition of an anti-dumping duty on caustic soda imports under specified tariff sub-headings from Thailand, Chinese Taipei and Norway, based on findings that exports were below normal value and caused material injury. The duty is calculated as the difference between a stated per-unit reference amount and the landed value of imports, using assessable value rules and the government-notified rate of exchange; a detailed table sets product descriptions, origin/export permutations, producers/exporters and per-unit benchmark amounts for computation.