Michael Gove has defended plans to override parts of the Brexit Withdrawal Agreement as a means of protecting the “integrity” of the UK.
The Cabinet Office minister said the UK was being “generous” with the EU over the Brexit negotiations.
The EU has threatened legal action over the Internal Market Bill, which ministers say will break international law in a “specific and limited way”.
PM Boris Johnson is urging Tory MPs to back it, after some raised concerns.
The bill, which will be formally debated in the House of Commons for the first time on Monday, addresses the Northern Ireland Protocol – the part of the Brexit Withdrawal Agreement designed to prevent a hard border returning to the island of Ireland.
If this became law it would give UK ministers powers to modify or “dis-apply” rules relating to the movement of goods between Britain and Northern Ireland that will come into force from 1 January, if the UK and EU are unable to strike a trade deal.