Examples of select indoor spaces with smoking ban exceptions that create THS exposure risks
| Setting | Smoking ban | Smoking exemptions | |
| Home childcare, foster and group homes | When children are present. | After hours or on weekends when children are absent*. | |
| Home healthcare | When home healthcare provider is present. | When provider is absent. | |
| Hotels, online lodging market-places | Some guest rooms are smokefree. | Guests smoke in designated rooms, transporting THS through shared ventilation. | |
| Motor vehicles | When a minor (<18 years old) is present. | When no children are in the vehicle. | |
| Rental cars, party buses, limousines | Some vehicles are smokefree. | Passengers smoke in designated vehicles. | |
| Vehicle fleets, cabs of trucks and tractors | When non-smoking passengers are present. | Drivers smoke when alone in the vehicle. | |
| Workplaces | Smokefree indoor workspaces with provided smoking breaks. | Employees smoke outside when on break, transporting THS to smokefree indoor spaces on self. | |
| Restaurants and bars | Smokefree during the day. | Operate as hookah or smoking lounge in the evening. | |
*Some jurisdictions (eg, California, New York) have already dropped this exemption.
THS, thirdhand smoke.