In the case of persons arriving from a contiguous country which maintains a free zone or free port, if the Secretary of the Treasury deems it necessary in the public interest and to facilitate enforcement of the requirement that the exemption in subheading 9804.00.70 shall apply only to articles acquired as an incident of the foreign journey, he shall prescribe by regulation or instruction, the application of which may be restricted to one or more ports of entry, that such exemption shall be allowed only to residents who have remained beyond the territorial limits of the United States for not less than a specified period, not to exceed 24 hours, and, after the expiration of 90 days after the date of such regulation or instruction, allowance of the said exemption shall be subject to the limitations so prescribed
Secondary outcomes will compare percent days smoke-free, changes in nicotine dependence, and motivation, confidence, and intentions to quit smoking across the regulatory scenarios
Quitting smoking greatly reduces the risk of respiratory diseases such as COPD, cancer, heart disease, vascular disease, and infertility
Many people think hookah is safe and fun, but it has health risks just like any tobacco product
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