The Government has criticised the EU for calling for post-Brexit customs plans around Northern Ireland border to be outlined.
Downing Street said the European Commission (EC) had circulated a technical note without discussing it with London.
Prime Minister Boris Johnson's spokesman added: "The EC has chosen to publish this technical note to set out its own views on the implementation of the Northern Ireland protocol.
"It was not shared at recent meetings with the UK, nor has it been agreed by the Government.
"Most strikingly, the note appears to miss the fundamental objective of the Northern Ireland protocol. There is no mention of the Belfast Agreement or the peace process anywhere.
"We are committed to compiling with our obligations under the protocol, just as we expect the EU to comply with theirs.
"We will continue to take forward discussions.
"It seems to be the EC's decision to publish this note, having not shared it at recent meetings with the UK, nor having agreed it with the Government."