The drawback claimant or manufacturer must request that the Director, National Revenue Center, TTB, provide the CBP office where the drawback claim will be processed with a tax-paid certificate on TTB Form 5100.4 (Certificate of Tax-Paid Alcohol)
The main reason this is so is the conflictive legal landscape of these substances

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Smoking can cause various oral health problems, including gum disease, tooth decay, and oral cancer