Commission Implementing Regulation (EU) 2017/420 of 9 March 2017 concerning the authorisation of a preparation of thyme oil, synthetic star anise oil and quillaja bark powder as feed additive for chickens for fattening, chickens reared for laying, minor avian species for fattening and reared for laying (holder of the authorisation Delacon Biotechnik GmbH) (Text with EEA relevance. )