Final answer:
If a passenger in the front seat who is at least 18 years old is not wearing a seatbelt during a traffic stop, they would typically be charged with the violation.
Step-by-step explanation:
If a passenger in the front seat who is at least 18 years old is not wearing a seatbelt during a traffic stop, they would typically be charged with the violation.
In many jurisdictions, the responsibility for wearing seatbelts is placed on the individual passengers, rather than the driver.
However, it's important to note that laws can vary from state to state and country to country, so it's always best to consult the specific laws in the jurisdiction where the traffic stop occurred.