These Regulations amend Council Regulation (EU) 2020/123 fixing for 2020 the fishing opportunities for certain fish stocks and groups of fish stocks, applicable in Union waters and, for Union fishing vessels, in certain non-Union waters (Council Regulation (EU) 2020/123), which is secondary assimilated law within the meaning of section 21(1) of the Retained EU Law (Revocation and Reform) Act 2023 (c. 28), as read with section 12(2) of that Act.