These Regulations are made in exercise of the power in sections 51(1)(a), 52(2) and 56(1) of the Taxation (Cross-border Trade Act 2018 (c. 22) (“TCTA 2018”) in consequence of, or otherwise in connection with, the withdrawal of the United Kingdom from the European Union and in consequence of TCTA 2018. They are to come into force on such day as the Treasury by regulations may appoint.
Link: The Value Added Tax (Accounting Procedures for Import VAT for VAT Registered Persons and Amendment) (EU Exit) Regulations 2019
Source: Legislation .gov.uk