The Moon Treaty of 1979 was intended to govern how the moon's resources would be used, Space.com reports. But none of the spacefaring nations has signed it, rendering it moot. This leaves countries to rely on the Outer Space Treaty, and because it doesn't explicitly ban resource extraction, it can probably be interpreted to mean it's allowed. Still, this doesn't address who owns the title to the materials. On this planet, when you mine for precious resources, you'd want to make sure you own them after you take them out of the ground, because then you can sell them.