Final answer:
Taxi drivers and emergency responders are often exempt from wearing seat belts due to the nature of their duties. Bus drivers may also have exemptions based on local laws and policies.
Step-by-step explanation:
The question regarding who is exempt from wearing a seat belt where the assemblies are provided relates specifically to traffic laws and health and safety regulations. According to general safety regulations, there are certain exemptions for specific categories of drivers or vehicle occupants from the requirement of wearing seat belts. Notably, taxi drivers and emergency responders, while performing their duties, are often exempt from this requirement. Moreover, bus drivers may also have exemptions, especially when they are operating a vehicle within city limits and making frequent stops. However, this can vary based on local laws or specific company policies. It's essential to consult local traffic laws to identify any exemptions accurately.