Commission Decision of 22 December 2011 authorising the placing on the market of products containing, consisting of, or produced from genetically modified maize MIR604xGA21 (SYN-IR6Ø4-5xMON-ØØØ21-9) pursuant to Regulation (EC) Nº 1829/2003 of the European Parliament and of the Council (notified under document C(2011) 9533)