The finest Sparkling wine in the world is Champagne, which is only made from three varieties; Chardonnay, Pinot Noir and Pinot Meunier that are grown within the Champagne region in northern France. Here the cool climate and chalky soils produce wines with delicate fruit flavours with extremely high levels of natural acidity that are ideal for the production of Sparkling wines with great finesse. To ensure its quality standards remain high, the production of Champagne is highly regulated. The fruit must be grown within the region, strict yields must be adhered to and Champagne must be made using the tradition method. That means that Champagne is always sold in the same bottle in which it undergoes its secondary fermentation. Non-Vintage (NV) Champagne must spend a minimum of 15 months on lees. In the best years Vintage Champagne might be released, and this must spend at least 3 years on lees.