The Danish government has been advised to seek guarantees on its collective bargaining rights system before the EU's new treaty is ratified.
The call came from the opposition Social Democrats, who have been on alert since the EU's highest court in December ruled that a Swedish trade union picket against cheap Latvian labour was illegal.
"We believe the Lisbon Treaty does secure collective bargaining rights, but the court has delivered a very unclear verdict, which we advise the government to interpret in a satisfactory way before signing the Lisbon Treaty," the chairperson of the Danish parliament's Europe committee, Svend Auken, told EUobserver