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(b) *  *  *

(1) Statement of alcoholic content shall be expressed in percent alcohol by volume, and not by proof, by a range, or by maximums or minimums, unless required by State law. Other truthful, accurate, and specific factual representations of alcohol content, such as alcohol by weight, may be made, as long as they appear together with, and as part of, the statement of alcohol content as a percentage of alcohol by volume.

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