By the Outer Space Treaty. > outer space shall be free for exploration and use by all States; Any state can use space as they like. Also: > States shall be

By the Outer Space Treaty. > outer space shall be free for exploration and use by all States; Any state can use space as they like. Also: > States shall be responsible for national space activities whether carried out by governmental or non-governmental entities; The US government says it's okay so it's okay.