Bordeaux wine regions Croix de Mont. All of these regions (except the Libournais) have their own "appellation" and are governed by "Appellation d'origine contrôlée" laws which dictate the permissible grape varieties, alcohol level, methods of pruning and picking, density of planting and appropriate yields as well as various winemaking techniques. Bordeaux wine labels will usually include the region on the front if all the grapes have been harvested in a specific region and the wine otherwise complies with the AOC requirements. There are about 50 AOCs applicable to the Bordeaux region. Both red and white Bordeaux wines are almost invariably blended. The permissible
Margaret River (wine region) with only 200 millimetres of the annual 1160 millimetres falling between October and April. The low diurnal and seasonal temperature range means an unusually even accumulation of warmth. Overall the climate is similar to that of Bordeaux in a dry vintage. Although the region produces just three percent of total Australian grape production, it produces over 20 percent of Australia's premium wine market. The principal grape varieties are fairly evenly split between red and white; Cabernet Sauvignon, Chardonnay, Sauvignon blanc, Sémillon, Shiraz, Merlot, Chenin blanc and Verdelho. There are no official Margaret River subregions, although in 1999 viticultural scientist Dr