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Reference: Saudi Arabia reveals quantity of allowed electronic cigarettes to enter the Kingdom

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Under an AVC, the corporation agrees to conditions which may include instructing their clerks to check identification for all tobacco customers who appear under the age of at least 27, using security videotape to monitor compliance by clerks, eliminating all self-service tobacco displays and vending machines, performing random compliance checks involving youth tobacco purchasers, and implementing other safeguards

4 When on-pack tar and nicotine yield labelling began in 1982, there were four categories of nominal tar yields or tar bands: 4mg or less, 8mg or less, 12mg or less and 16mg or less

Exposure to Electronic Cigarettes Impairs Pulmonary Anti-Bacterial and Anti-Viral Defenses in a Mouse Model