A study in the American Journal of Preventive Medicine shows localities can provide an extra
layer to the federal Tobacco 21 law by adding components to their own T21 laws, like a
comprehensive definition of tobacco, retail licensure, a graduated penalty structure, and an
enforcement mechanism (e.g., compliance checks, inspections, etc.). Now, most local T21
policies involve definitions, licensing, and penalties, but most lack these enforcement
components and enhanced age-verification requirements. See the paper.