to become sparkling Champagne. This aged still wine is called reserve wine, and this practice is meant to ensure that a certain Champagne house's non-vintage product has a consistent style over the years. Since the reserve wine is used in the production process, it is not bottled and sold as it is, but the proportion and age of the reserve wine can contribute to the quality of a Champagne. Austrian DACs In the Austrian Districtus Austriae Controllatus (DAC) system, most DACs have an additional Reserve designation for a wine which has slightly more strict requirements. German Kabinett Before the 1971 German wine law, a term corresponding to reserve wine existed in kabinett, sometimes written as Kabinettwein. In 1971, the similar-sounding term Kabinett was instead introduced as the lowest level of the Prädikatswein category, i.e., with a completely different meaning. Therefore, in the present German wine classification no legally defined term corresponding to reserve wine exists. See also Second wine Vintage port References Wine terminology