Modifies provisions relating to indoor air quality

HB 1618 proposes a new "Missouri Clean Indoor Air Act" by redefining key terms that determine where smoking and vaping are prohibited. It clarifies that smoke-free rules apply to restaurants, health care facilities, government buildings, and most workplaces, while creating specific exemptions for certain cigar-tobacco bars that meet revenue thresholds (over 50% from tobacco sales). The bill defines terms like "electronic smoking device" (including e-cigarettes and vapes), "secondhand smoke," and "enclosed area" to establish clear boundaries for smoke-free zones. This proposed legislation would directly affect businesses (especially bars and food service venues), employees, and public health agencies by standardizing indoor air quality requirements. The bill is currently in early legislative stages (prefiled and read first/second time in 2026) and has not yet become law.