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Label Lens

What is checked

Label Lens runs a fixed set of deterministic checks. This page lists every one of them, the source it cites, and what it cannot decide.

6 checks are registered in this profile. 3 can be evaluated from artwork and the facts you state. 3 could not be evaluated from artwork alone.

What this covers

Rule profile
wine-precheck@1.0.0
Beverage category
Domestic wine only. No beer, malt beverage, or spirits profile exists.
Fields read from artwork
Brand name and Alcohol statement. Nothing else on the label is read.

A citation below points to the source a rule was written against. Label Lens does not reproduce or interpret the regulation, and nothing on this page is legal advice or a TTB position.

Checks that can be evaluated from artwork

These compare what the system reads from the image against the facts you state. A result is a rule outcome, not a government decision.

  1. wine-alcohol-syntax

    Rule version v1.0.0

    Reads a statement and checks it parses

    What the system does: Checks whether the alcohol statement read from the artwork parses as a supported alcohol-statement form.

    Source cited
    27 CFR 4.36 (snapshot 2026-07-10)
    Evidence used
    Alcohol statement
    Can run from artwork
    Yes

  2. brand-name-canonical-comparison

    Rule version v1.0.0

    Compares text you stated with text on the artwork

    What the system does: Compares the brand name you stated with the brand name read from the artwork, after conservative canonical normalization. It is not a fuzzy, semantic, or similarity match.

    Source cited
    27 CFR 4.32; 27 CFR 4.33 (snapshot 2026-07-10)
    Evidence used
    Brand name
    Can run from artwork
    Yes

  3. wine-alcohol-declared-comparison

    Rule version v1.0.0

    Compares a number you stated with a number on the artwork

    What the system does: Compares the alcohol value you stated with the alcohol statement read from the artwork.

    Source cited
    27 CFR 4.36 (snapshot 2026-07-10)
    Evidence used
    Alcohol statement
    Can run from artwork
    Yes

Checks that could not be evaluated from artwork alone

These are registered and named, and they deliberately do not run. Each one needs evidence that a label image cannot establish. The system reports them as not run rather than guessing — and artwork is never accepted as proof of any of them.

  1. wine-alcohol-actual-content-tolerance

    Rule version v1.0.0

    Cannot be evaluated from artwork alone

    What the system does: Would compare the stated alcohol against the product's actual alcohol content. The system never treats artwork as proof of actual content, so it does not run.

    Requires evidence the artwork cannot provide: actual alcohol content with provenance

    Source cited
    27 CFR 4.36 (snapshot 2026-07-10)
    Evidence used
    None read from artwork
    Can run from artwork
    No — could not be evaluated from artwork alone

  2. wine-alcohol-class-type-boundary

    Rule version v1.0.0

    Cannot be evaluated from artwork alone

    What the system does: Would decide whether the product crosses a class/type or taxable boundary. That depends on evidence the artwork does not establish, so it does not run.

    Requires evidence the artwork cannot provide: class/type or taxable-boundary evidence

    Source cited
    27 CFR 4.36 (snapshot 2026-07-10)
    Evidence used
    None read from artwork
    Can run from artwork
    No — could not be evaluated from artwork alone

  3. wine-alcohol-omission-eligibility

    Rule version v1.0.0

    Cannot be evaluated from artwork alone

    What the system does: Would decide whether the alcohol statement may be omitted. That depends on a designation the artwork does not establish, so it does not run.

    Requires evidence the artwork cannot provide: table/light-wine designation evidence

    Source cited
    27 CFR 4.36 (snapshot 2026-07-10)
    Evidence used
    None read from artwork
    Can run from artwork
    No — could not be evaluated from artwork alone
What the system cannot determine

It does not decide whether a label may be used, and it issues no approval, rejection, or clearance. There is no overall status, score, or percentage — by design.

It reads only the two fields listed above. Other required label statements are not read, not checked, and their absence from a result means nothing.

When a field is not detected, that means the extractor found no supported evidence. It does not prove the statement is absent from the artwork.

It holds no record between runs. Nothing you upload is stored, and no result carries over to a later visit.

This tool supports preparation and review. It does not approve or reject a label, and it is not a TTB approval or legal determination.