(9)To allow trading venues, APAs and investment firms to implement the required changes into their systems, certain amendments introduced by this Regulation should apply from 1 January 2024. In order to ensure legal certainty and continuity for transactions executed before 1 January 2024 but which are published or amended after that date, Article 12 of and Annex I, II and IV to Delegated Regulation (EU) 2017/583 as applicable on 31 December 2023 should continue to apply to transactions executed before 1 January 2024.