Commission Regulation (EU) Nº 850/2010 of 27 September 2010 initiating a ‘new exporter’ review of Council Regulation (EC) Nº 1659/2005 imposing a definitive anti-dumping duty on imports of certain magnesia bricks originating in the People’s Republic of China, repealing the duty with regard to imports from one exporter in this country and making these imports subject to registration