Commission Implementing Regulation (EU) 2017/55 of 14 December 2016 concerning the authorisation of octan-2-ol, isopropanol, pentan-2-ol, octan-3-ol, heptan-2-one, pentan-2-one, 6-methyl-hepta-3,5-dien-2-one, nonan-3-one, decan-2-one and isopropyl tetradecanoate as feed additives for all animal species (Text with EEA relevance. )