Rep. Richard Hudson (R-NC) talked about the full faith and credit clause in relation to the interstate concealed carry laws.
Article IV, Section. 1 of the United States Constitution provides that "Full Faith and Credit shall be given in each State to the public acts, records, and judicial proceedings of every other State. And the Congress may by general laws prescribe the manner in which such acts, records and proceedings shall be proved, and the effect thereof." Consequently, an Illinois birth certificate could be used to enroll a kindergartener in a Virginia school and a Californian with a valid driver's license could drive a car in Massachusetts. In recent years, this clause has been raised in public policy debates about same-sex marriage and concealed weapons permits.