Legislation signed by Governor Corbett in December of 2011 have changed the provisions of Pennsylvania's Seat Belt Law. One of those changes is specified below
"Drivers and occupants in a vehicle who are under the age of 18 must wear a properly adjusted and fastened seat belt, and children under the age of eight must be securely fastened in a child restraint system. Failure to comply with the new law’s seat belt provisions is a primary offense, meaning that a driver can be pulled over and cited solely for that violation." Additional Information can be found in this HANDOUT or on PennDOT's website