Amendment to Regulation (EU) No 231/2012 (+1 more) on specifications for food additives listed in Annexes II and III to Regulation (EC) No 1333/2008 of the European Parliament and of the Council as regards specifications for rebaudiosides M, D and AM produced via enzymatic conversion of purified stevia leaf extracts and the specifications for rebaudioside M produced via enzyme modification of steviol glycosides from Stevia (E 960c(i))