Commission Regulation (EU) No 437/2012 of 23 May 2012 initiating an investigation concerning the possible circumvention of anti-dumping measures imposed by Council Implementing Regulation (EU) No 791/2011 on imports of certain open mesh fabrics of glass fibres originating in the People's Republic of China by imports of certain open mesh fabrics of glass fibres consigned from Taiwan and Thailand, whether declared as originating in Taiwan and Thailand or not, and making such imports subject to registration