COMMISSION DELEGATED REGULATION (EU) 2017/323 of 20 January 2017 correcting Delegated Regulation (EU) 2016/2251 supplementing Regulation (EU) No 648/2012 of the European Parliament and of the Council on OTC derivatives, central counterparties and trade repositories with regard to regulatory technical standards for risk-mitigation techniques for OTC derivative contracts not cleared by a central counterparty