Anti-Dumping duty extension on Polytetrafluoroethylene extended through end of November by substituting prior expiry date. Amendment substitutes the prior expiry date in paragraph 3 of the principal notification imposing anti-dumping duty on Polytetrafluoroethylene from Russia, replacing the earlier expiry with '30th November, 2021' to extend the levy for an additional month pursuant to a continuation review and request by the designated authority under the Customs Tariff Act and the implementing anti-dumping rules.