Commission Regulation (EC) No 2261/2002 of 18 December 2002 on initiating an investigation concerning the alleged circumvention of anti-dumping measures imposed by Council Regulation (EC) No 408/2002 on imports of certain zinc oxides originating in the People's Republic of China by imports of certain other zinc oxides originating in the People's Republic of China and by imports of certain zinc oxides consigned from Vietnam, and making such imports subject to registration