Ministers from 47 countries will meet later to discuss the UK's plans to limit the powers of the European Court of Human Rights.
A senior government official said reaching an agreement was "like herding cats", but added that he was "pretty confident" it was possible.
The UK has criticised some of the court's judgements, including giving prisoners the vote and deciding against the deportation of Abu Qatada.
The conference takes place in Brighton.
Prime Minister David Cameron wants the countries which use the court to limit its ability to overrule cases already determined by national courts.
He wants to enshrine the principle of "subsidiarity" in the Brighton Declaration, which it is hoped ministers will agree at the end of the two-day conference.
This would mean that courts in member states should make decisions on human rights cases which are not deemed a
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