Solera by the producers of sherry. In a Spanish sherry "solera", the vintner may transfer about a third of each barrel a year. A solera sherry has to be at least three years old when bottled. A quite similar process is called sostrera, used to produce fortified wines in the Mediterranean regions of France. In Sicily, where Marsala wine is made, the system is called "in perpetuum". Solera vinification is used in the making of Mavrodafni ("Black Laurel"), a fortified red dessert wine made in the Northern Peloponnese in Greece. Exceptional "Mavrodafni" vintages are released every 20 or 30 years: they
American wine and Washington, D.C.. Wines with this designation are similar to the French wine "vin de table", and can not include a vintage year. By law, this is the only appellation allowed for bulk wines exported to other counties. Current U.S. laws allow American made wines to be labeled as "American Burgundy" or "California champagne", even though these names are restricted in Europe. U.S. laws only restrict usage to include the qualifying area of origin to go with these semi-generic names. Other semi-generic names in the United States include Claret, Chablis, Chianti, Madeira, Malaga, Marsala, Moselle, Port, Rhine wine, Sauternes (commonly