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The response came as the government reported back from consultations it has been carrying out with local Swiss authorities, business groups and unions on a new treaty to govern relations between Bern and Brussels.
"At its meeting of June 7 it approved the report on the consultations on the institutional agreement between Switzerland and the European Union and decided to demand clarifications," the Swiss cabinet said in a statement.
Provisions related to wage and worker protection, state subsidies and citizens' rights still needed to be clarified, the cabinet added.