The designation of “vin doux naturel” is reserved for wines whose production is traditional and customary:
Vinified directly by the harvesting producers and made exclusively from their harvests of muscat, grenache, macabéo or malvoisie; however, harvests obtained from plots planted with up to 10% of the total number of vines with grape varieties other than the four designated above are allowed;
Obtained within the limit of a yield of 40 hectolitres of must per hectare; any excess of this yield causes the entire harvest to lose the benefit of the “vin doux naturel” denomination;
Sourced from must with an initial natural sugar content of at least 252 grams per litre;
Obtained to the exclusion of any other enrichment by the addition of wine alcohol corresponding in pure alcohol to at least 5% of the volume of must used and to no more than the lower of the following two proportions:
Either 10% of the volume of the musts used;
Or 40% of the total alcoholic strength by volume of the finished product represented by the sum of the alcohol content acquired and the equivalent of the alcohol content in power calculated on the basis of 1% by volume of pure alcohol for 17.5 grams of residual sugar per litre.