A violation of the safety belt law is considered what kind of offense?

Answer: B — Secondary Offense

A "primary offense" means that the driver can be pulled over and ticketed solely for not wearing a seatbelt, without any other traffic violation occurring. "Secondary offense" means that the driver can only be ticketed for not wearing a seatbelt if they have already been pulled over for another traffic violation. So, if a driver is pulled over for speeding and is also found to not be wearing a seatbelt, they can only be ticketed for the speeding offense in a state with "secondary offense" laws. "Tertiary offense" refers to a law that has not been widely implemented, and is not commonly used. "Not an offense" is incorrect as not wearing a seatbelt is indeed a violation of the law, but its classification as a primary or secondary offense may vary by state or jurisdiction.