I read that the vaping laws were changed in arizona as of june 15th 2024, and that people 18+ can now buy nicotine unless you live in certain cities. i've been looking You Must Be 21 Years of Age or Older to Purchase E Cigs Vape Sign signs by salagraphics How Old Do You Need to Be to Vape? State Summary We Card Tobacco use in Missouri 2021 Missouri's attorney general and governor say they are working to tighten enforcement of vape sales after a First Alert 4 investigation exposed shops selling to underage customers.