Laws or regulations are very important to govern the usage of technologies. For example, in case that someone cloned animals or humans, laws need to play an important role to control their use and experimentation.
Since these kinds of technology can be both useful and harmful, the most essential duty of law is to take care of human morally and legally. In my opinion, it is not a good idea for scientists to clone humans because it must be chaotic if there are several people who have the same identities. Rather, cloning organs in order to transplant them to the patients or handicaps is quite a brilliant thought.