

2008+18=2026.
2008 is chosen so that effective immediately, no one new will be allowed to smoke, but those who were previously allowed to smoke can continue.
Making the date 2026 means it takes 18 years to go into effect. There isn’t a good reason to wait.
The alternative would be banning smoking outright, which would be coercive to those who are addicted to something that was legal when they started. This policy is a timely but fair way to outlaw something.

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