2) Providing services, necessary for the public good, common to all States and where it is in the best interest of the various states, or individual American citizens, the federal government bring continuity and uniformity to the provision of that service, where the various states cannot agree on a method to accomplish continuity and uniformity to the necessary service or, where the various states (through the individuals’ duly elected representatives) decide it would be more effective or efficient for the federal government to provide that service and then, give it the specific authority to perform the service; and