Mr Johnson’s spokesman said yesterday: “From our point of view I would say we are committed to working through the Joint Committee process to find a satisfactory outcome for both sides – that is our overriding priority.”
European Commission president Ursula von der Leyen launched legal proceedings on October 1 over Mr Johnson’s Internal Market Bill.
Brussels is furious that some measures would override part of the Brexit Withdrawal Agreement, which is now an international treaty.
Mr Johnson insists the legislation is a vital “safety net” that will prevent Brussels blocking food exports to Northern Ireland from the rest of the UK if a trade deal cannot be reached.
The EC said it was considering a “reasoned opinion” – a two-month ultimatum to obey EU rules – before further action was taken.
A spokesman said: “We are fully dedicated to the full implementation of the Withdrawal Agreement.
That is an agreement we reached with the UK in order to avoid a hard border on the island of Ireland, in order to protect peace and stability on the island of Ireland.
“That agreement now needs to be fully implemented and ready to go on January 1.”
Trade talks are continuing before the end of the Brexit transition period on December 31.
The most contentious measures in the Bill would not be needed if a deal can be reached and an update on progress is expected as early as today.