Anti dumping duty on acrylic fibre imposed to address below normal value imports from specified countries and protect domestic industry. Imposition of anti dumping duty on acrylic fibre under Chapter 55 applies to imports originating in or exported from USA, Thailand and Korea RP based on designated authority findings that the product was exported below normal value and caused material injury to the domestic industry; country and exporter specific duty rates are prescribed and the duty remains effective up to and inclusive of a stated date unless revoked or extended.