Age statement

Two halves of that definition do the work. The first is what is being measured: barrel time, starting at distillation and ending at bottling.

A bottle that then sat on a shelf for thirty years is not thirty years older.

The second is which spirit the number counts. A bottle can hold whisky of several ages, and the number reports the age of the youngest whisky in it.

Any other rule would let one barrel of thirty year old whisky carry a tank of three year old, and the United States, Scotland and Ireland all shut that door the same way.

Where do the US, Scotland and Ireland disagree?

They part company over the form the number takes, and over when it has to appear at all.

The American rule is the only one that ever compels a number. A whisky aged less than four years must carry an age statement and a percentage of types statement, and the single exemption is a whisky labelled bottled in bond.

Scotland goes furthest the other way. Its specification works the rule through with an example: a blend holding twelve year old and sixty year old whiskies may only be sold as twelve years old, and no reference may be made to the sixty on the label or in promotion.

What may an age statement say, and what is prohibited?

Understating is allowed, while overstating is prohibited, and so is any age that contradicts the category on the label.

The asymmetry follows from what the number counts. A bottler who declares less than the youngest spirit actually in the bottle has still described a whisky that is at least that old, while one who declares more has described a whisky that is not there.

The second prohibition is the one a reader is most likely to meet, because it makes the age and the class name check each other.

The regulation gives its own case: a whisky designated straight rye must be aged at least two years, so Aged 1 year is prohibited on it even if the whisky is genuinely older, because the number conflicts with the standard the name asserts.

What must a blended whiskey label spell out?

The American rule goes further for whisky that contains neutral spirits. If any straight or other whisky in such a bottle is under four years old, the label must give the percentage by volume of each of those whiskies and the age of each, set immediately beside the neutral spirits statement, in a form like 40 percent straight whisky 3 years old.

That is why a percentage travels with the age rather than standing on its own. Below four years a bare number would not say how much of the bottle it describes, and blended American whiskey is the category where a reader meets the two together.

A smaller allowance sits beside it, because a whisky matured in more than one kind of container may name the types of oak container used, which is wording a bottler may add and not part of the age itself.

Does the youngest-spirit rule only apply to whisky?

No. 27 CFR 5.74 states it for distilled spirits generally, and the three whisky regimes above are where a reader meets it rather than where it lives.

What changes outside whisky is whether a number has to appear at all.

• Rum, brandy and agave spirits. An age statement is optional.
• A brandy under two years in oak. The exception, and the only place a number is compelled outside whisky: a statement of age must appear. Fruit brandies and grappa are outside it.
• Every other spirit. An age may be stated only where the spirit was stored in an oak barrel and nothing was done to it beyond mixing with water, filtering and bottling.

The brandy rule is the American whisky rule wearing different clothes. Both compel a number out of a young spirit and let an older one say nothing.

So a missing age on a rum reports nothing, while a missing age on a brandy reports two years in oak, unless it is a fruit brandy or a grappa.

Does a missing age statement mean a young whisky?

A bottle with no age on it is not hiding one. Outside the American four year rule the statement is optional, and bourbon sets no minimum ageing period at all, so a bourbon without a number is declining to make a claim rather than concealing a young spirit.

Nor is an age a quality mark.

It reports duration in wood, and what that time did depends on the barrel, the strength it went in at, and the warehouse. A blended malt Scotch shows the limit of the figure plainly: it may hold malts from several distilleries and several ages, and the one number on the front describes the youngest of them.