Which of the following is NOT a reason for a vehicle to be exempt from inspection?

A vehicle that is over 25 years old does not qualify for an exemption from inspection in Pennsylvania because vehicles of this age are actually subject to certain inspection requirements. However, vehicles classified as trailers are generally exempt from the same inspection process as passenger vehicles, as are vehicles that are towed by another vehicle, since they do not operate independently on public roads. Additionally, a new model that is still in testing may also not be required to undergo the regular state inspection process until it is officially on the market. Therefore, being over 25 years old is not a valid reason for exemption, as older vehicles have specific considerations under the law.