Scotch whisky whisky used. An age statement on the bottle, in the form of a number, must reflect the age of the youngest whisky used to produce that product. A whisky with an age statement is known as guaranteed age whisky. Scotch whisky without an age statement may, by law, be as young as three years old. In the early 21st century, such "No age statement" whiskies became more common, as distilleries responded to the depletion of aged stocks caused by improved sales. Labels may also carry various declarations of filtration techniques or final maturation processes. A Scotch whisky labelled as "natural"
Blended malt whisky using a corn mash). In practice, unless a different grain is specifically mentioned, a "malt" whisky is assumed to be made from barley. In the case of Scotch whisky, blended malts do not contain any whisky made from grains other than barley or spirits distilled using continuous distillation, unlike products labelled as "blended whisky". For the Scotch whisky industry, the terms "vatted malt" or "pure malt" have been reclassified as "blended malts" per the Scotch Whisky Regulations of 2009, and it has become unlawful to label Scotch Whisky using the prior terminology. When an age statement appears on the label