What are laws and treaties in science?

In science, a law is a concise and usually mathematical statement that describes how a particular phenomenon works. The best known example is the law of gravity (or as originally stated, Newton's Law of Universal Gravitation) which tells us, among other things, why things fall and how fast they will fall, why the moon orbits the Earth and why the Earth orbits the sun, and so forth. Science does not make treaties, however. Treaties exist only in the realm of politics, not science.