Anti-dumping duty extension on sodium cyanide continues pending completion of the sunset review and investigative proceedings. Extension of anti-dumping duty on sodium cyanide pending completion of a sunset review. The designated authority requested continuation of the duty while investigations proceed, and the Central Government, exercising powers under the Customs Tariff Act and relevant anti-dumping rules, amended the original notification to substitute the operative paragraph and specify a new terminal date for the duty's effectiveness.