Even when their own laws diverge, Article IV, Section 1 guarantees that states recognize and honor the state laws and court rulings of other states. For instance, even though a marriage or divorce would not have been permitted under Florida law, if New Jersey residents marry, divorce, or adopt children in New Jersey, Florida must accept these activities as legal. Similar to this, if a court in one state issues an order requiring someone to pay money or cease acting in a specific way, courts in other states must respect and uphold that state's decision. Although not taken into account when the constitution was written, it also applies to driver's licenses.
States occasionally do not adhere to this article, nevertheless. Particularly with regards to concealed carry gun permits and medical professional licensure in other states.