(20)Regulation (EU) 2024/791 introduced into Article 2(1) of Regulation (EU) No 600/2014 a definition of ‘designated publishing entity’, and inserted into that Regulation a new Article 21a, which allows an investment firm that is a designated publishing entity to be responsible for making a transaction public through an APA. That same new Article 21a also specifies which party to a transaction should be responsible for making a transaction public where one, neither or both of the parties involved are designated publishing entities. It follows that the requirements laid down in Delegated Regulation (EU) 2017/587 that aim to identify the investment firm responsible for making a transaction public through an APA should be deleted.