The new EU regulations come into force on 28.11.2023 and apply immediately without transitional periods.You can find the current regulations here:
Commission Delegated Regulation (EU) 2023/2465 of 17 August 2023 supplementing Regulation (EU) No 1308/2013 of the European Parliament and of the Council with regard to marketing standards for eggs and repealing Commission Regulation (EC) No 589/2008
https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=CELEX:32023R2465
Commission Delegated Regulation (EU) 2023/2464 of 17 August 2023 amending Regulation (EU) No 1308/2013 of the European Parliament and of the Council as regards marketing standards for eggs
https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=OJ:L_202302464
Commission Implementing Regulation (EU) 2023/2466 of 17 August 2023 laying down detailed rules for the application of Regulation (EU) No 1308/2013 of the European Parliament and of the Council as regards marketing standards for eggs
https://eur-lex.europa.eu/legal-content/DE/TXT/?uri=OJ:L_202302466