European Union (Withdrawal) Act 2018
The European Union (Withdrawal) Act 2018 (c. 16) is an act of the Parliament of the United Kingdom to repeal the European Communities Act 1972, and for parliamentary approval to be required for any withdrawal agreement negotiated between the Government of the United Kingdom and the European Union.
Source: Wikipedia — European Union (Withdrawal) Act 2018 (CC BY-SA 4.0)