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"However, it is now possible to be more specific with respect to the age that a smoker quits." Related: How drug addiction hijacks the brain The new study used data from the US National Health Interview Survey, a questionnaire-based survey used to monitor the health of the US population, and the National Death Index, a database of the nation's death records
Therefore, to the extent that (above items) qualify as parts, components, liquids, or accessories of ENDS devices, then they are now generally nonmailable. USPS added, interpretive questions about whether a specific item falls within the statutory definition should be directed to the Bureau of Alcohol, Tobacco, Firearms, and Explosives, with a copy to the Postal Services Pricing and Classification Service Center. The relevant provisions of the new rules are highlighted below for reference
Can You Bring a Mobility Scooter on a Plane