It is the law. You must make a written request to the authorities should you want to have a child and include details of the person you will be replacing. You will be notified within 2-3 weeks upon your application whether you request has been granted.
There are now 22 billion people in the world. People of the world has chosen popular communism because they needed to be told what to do. After 15000 years of civilisation, we have found the way to live forever. Doctors figured out how to have the heart beat and the brain grow forever. And cosmetics companies have perfected the anti-aging cream.
But now, for every new birth, someone has to die. Someone has to be replaced. And that someone has to be a member of your immediate family.