The label failed
On this page10
The alcohol content moved
To the back or the side, to clean up the front. It has to be in the same field of vision as the brand name and the class and type, viewable without turning the bottle.
The warning was bolded throughout
For emphasis, which seems helpful. Only "GOVERNMENT WARNING" is bold; the remainder is not.
The warning was condensed to fit
A narrow face squeezed the statement into the space available. Characters may not be compressed, and the density limit runs from 40 per inch at 1 mm down to 12 at 3 mm.
The type size was right for the wrong bottle
Artwork built for a 200 mL bottle reused on a 250 mL one. The threshold is at 237 mL, so the minimum went from 1 mm to 2 mm and the label did not.
The background was not contrasting
Reversed out of a photograph or set in a tint close to the stock. The statement has to be readily legible under ordinary conditions on a contrasting background.
The label lifted in an ice bucket
A permanent adhesive that was not specified for wet conditions. It is a compliance failure as well as a presentation one, because the regulation requires the label to resist removal.
And nobody looked at the bottle
The common root. Every one of these is visible by printing the label, applying it to the real container, and looking at it from arm’s length in ordinary light before the print run is approved.
Why a proof is not the test
A flat proof shows the artwork and cannot show you the curve, the glass colour behind a clear stock, or what the liquid does to the back label read through the bottle. All three change what is legible and what is in one field of vision.
Keep a labelled bottle from every print run
Unopened, on a shelf. When a question arises two years later about what was on the label, a photograph of the artwork is not the same evidence as the bottle that shipped.