Representing winemakers from France, Italy, Portugal and Spain and labels such as Chianti, Rioja, Chablis and Burgundy, they said the plan would hurt sales and threatened their future.
"Quality wines have been built around a tradition using certain rules, and these should be kept and respected. This cannot be changed just like that," Joaquim Madeira, president of Portugal's National Association of Viticulture Denominations of Origin (ANDOVI), told a news conference.
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