The standards of identity for distilled spirits are codified in Subpart I of 27 CFR Part 5, at 27 CFR 5.141 through 27 CFR 5.156. TTB comprehensively recodified Part 5 in 2022 (T.D. TTB-176), so the pre-2022 section numbers (the old §§ 5.22 and 5.35 era) no longer exist — citations to legacy numbering are a common source of confusion in older compliance materials. Under 27 CFR 5.63, a class, type, or other designation is mandatory label information on every distilled spirits container.

What a Standard of Identity Is — and Why Designation Is Mandatory

27 CFR 5.141 explains the system: distilled spirits are divided, for labeling purposes, into classes (whisky, gin, brandy, rum), which are further divided into specific types (bourbon whisky, London dry gin, Cognac). The standards that define these classes and types are the "standards of identity." Key structural rules in § 5.141:

• Unless otherwise specified, when a standard requires a mash of a particular ingredient, the mash must be made entirely of that ingredient

• A product that conforms to more than one class may be designated with any single class designation to which it conforms

• If both class and type appear, the type designation must be as conspicuous as the class designation and appear in the same field of vision

• All words in a designation must be similarly conspicuous and appear together

The designation is not marketing copy — it is a legal statement that the liquid conforms to a defined production standard. TTB reviews it at COLA (certificate of label approval) submission, and a designation that does not match the formula or production process is a routine basis for rejection or a needs-correction return.

The Classes: Section by Section

• § 5.142 Neutral spirits or alcohol — including the types vodka (neutral spirits, which may be treated with up to 2 g/L sugar and 1 g/L citric acid, and may not be aged or stored in wood barrels except paraffin-lined barrels for bottled-in-bond products) and grain spirits. Adding any other flavoring or blending material changes vodka's classification to flavored vodka or a specialty product

• § 5.143 Whisky — the class definition plus 19 type standards (see table below)

• § 5.144 Gin — must derive its main characteristic flavor from juniper berries and be bottled at not less than 40% ABV (80° proof)

• § 5.145 Brandy — fruit brandy, plus protected foreign types including Cognac, Armagnac, Calvados, Pisco, and Singani. Grape brandy stored less than 2 years in oak must be designated "immature brandy"

• § 5.146 Blended applejack

• § 5.147 Rum — including Cachaça, a distinctive product of Brazil

• § 5.148 Agave spirits — including Tequila and Mezcal, both distinctive products of Mexico that must be made in Mexico under Mexican law

• § 5.150 Cordials and liqueurs — with type rules for sloe gin, amaretto, triple sec, "crème de" products, and whisky-based liqueurs (rye or bourbon liqueur requires at least 51% of the spirits, on a proof gallon basis, to be the named whisky, bottled at not less than 30% ABV)

• § 5.151 Flavored spirits and § 5.152 Imitations

Sections 5.149 and 5.153 are currently [Reserved].

The Whisky Types Table (§ 5.143(c))

27 CFR 5.143(a) defines the class: whisky is a grain distillate produced at less than 190° proof, stored in oak barrels (corn whisky excepted), and bottled at not less than 80° proof. The type standards in § 5.143(c) then turn on four production variables — mash bill, distillation proof, barrel type, and barrel entry proof:

Two details in this table drive real-world compliance outcomes. First, bourbon is the only type in row 2 that may not contain harmless coloring, flavoring, or blending materials — rye, wheat, and malt whisky may. Second, the "straight" designation is optional but requires a minimum of 2 years in the prescribed barrels; and under 27 CFR 5.74 (statements of age, storage, and percentage), age statements are governed separately — for corn whisky, oak storage is triggered only when the label claims an age at all.

The American single malt whisky standard (rows 15–16 of the table) was added by T.D. TTB-199 in December 2024 — it requires 100% malted barley produced and distilled at a single U.S. distillery, and permits no coloring/flavoring/blending materials except caramel coloring disclosed on the label.

"Distilled From" Designations and Alteration of Class

Barrel choice changes identity. Whisky made from a bourbon mash bill but aged in used barrels cannot be labeled bourbon — it must be designated "whisky distilled from bourbon mash" under § 5.143(c). The same logic applies to treatments: under 27 CFR 5.155 (alteration of class and type), coloring, flavoring, or blending materials that are not essential components of the class may be added only up to 2.5 percent by volume of the finished product without changing the class or type. Cross that line — or add anything at all to a class that forbids it, like bourbon or vodka — and the product becomes a flavored spirit or a distilled spirits specialty product with a different required designation. A gin with added coloring, for example, is a specialty product, not gin.

Specialty Products and Fanciful Names (§ 5.156)

Products that fit no standard of identity are distilled spirits specialty products under 27 CFR 5.156. They must be designated in accordance with trade and consumer understanding or, absent one, with a distinctive or fanciful name (which may be a cocktail name) appearing in the same field of vision as a statement of composition that follows § 5.166. Together, the fanciful name and statement of composition serve as the class and type designation. Critically, a specialty product may not bear a designation indicating it contains a class or type of spirits unless the spirits inside actually conform to that class and type.

Geographic Designations (§ 5.154)

27 CFR 5.154 protects geographic names. Names for distinctive products — Scotch whisky (Scotland), Cognac (France), Tequila and Mezcal (Mexico), Cachaça (Brazil) — may only be used on spirits made in the named place under that country's laws. Conversely, § 5.154(b) makes bourbon a distinctive product of the United States: the word "bourbon" may not describe any whisky not produced in the U.S. Names TTB has found generic (London dry gin, Geneva gin) are free for anyone to use; non-generic geographic names that are not distinctive types (Armagnac, Jamaica rum) still may not be applied to spirits made elsewhere.

How Truli Helps with Standards of Identity Compliance

• Designation checks: Truli's AI agents scan spirits labels against the actual text of 27 CFR Part 5, flagging class/type designations that do not match the stated production process, mash bill, or added ingredients, with the specific section cited on every finding

• COLA-readiness review: Truli checks the mandatory label elements under § 5.63 — including designation conspicuousness and same-field-of-vision rules — before you submit to TTB, reducing rejection cycles

• Specialty product logic: Truli identifies when added flavors, colors, or blending materials push a product out of its claimed class under § 5.155 and into § 5.156 specialty territory requiring a statement of composition

• Marketing consistency: Truli scans packaging and marketing content so the class/type story stays consistent everywhere the product appears, not just on the front label

Related Regulations

• TTB 27 CFR Part 5 — Distilled Spirits Labeling — The full labeling rule Part 5 sits within, including mandatory statements and net contents

• TTB 27 CFR Part 13 — COLA Label Approval — The certificate of label approval process where designations are reviewed

• 27 CFR 4.23–4.27 — Wine Appellations, Varietals, and Vintage — Wine's parallel identity system of appellations and varietal percentages

• TTB Advertising Rules — 27 CFR — Class and type must also appear in advertising, including social media

• FAA Act — Federal Alcohol Administration Act — The statutory authority behind Part 5

Frequently Asked Questions

Can I call my product bourbon if it was aged in used barrels?
No. Bourbon requires storage in charred new oak barrels entered at 125° proof or less under § 5.143(c). A 51%-corn whisky aged in used oak must be designated "whisky distilled from bourbon mash" — and note that "bourbon" itself may never describe whisky produced outside the United States under § 5.154(b).

Does "straight bourbon" require an age statement?
"Straight" requires a minimum of 2 years in charred new oak, but an age statement is a separate question governed by § 5.74. Straight whiskies aged under 4 years generally must state their age; corn whisky triggers barrel storage requirements only if age is claimed on the label at all.

My vodka has a hint of added botanical flavor. Is it still vodka?
No. Under § 5.142, vodka may only be treated with up to 2 g/L sugar and 1 g/L citric acid. Adding any other flavoring or blending material changes the classification to flavored vodka or a distilled spirits specialty product, and the label designation must change with it.

What designation does a bottled cocktail use?
Most ready-to-drink cocktails are distilled spirits specialty products under § 5.156. The distinctive or fanciful name (which can be the cocktail name, like "Margarita") plus a statement of composition in the same field of vision together serve as the class and type designation.

A note from Truli: Truli is not a law firm, and this article does not constitute or contain legal advice or create an attorney-client relationship. When determining your obligations and compliance with respect to relevant laws and regulations, you should consult a licensed attorney.

Last updated: August 2026. Reflects the cited 27 CFR sections as of August 2026. Truli monitors TTB rulemaking and enforcement. Book a demo to see how.