Which rules do the former US presidents have to follow?

Each former US president faces some rules and security restrictions he has to follow. What are those restrictions?

These rules deal not only with the nuclear secrets they have to keep. The classified information a US president gets during his term should be dealt with properly after he leaves the office. And the strangest thing is, former US presidents can't even drive on their own on a public road.

Watch this video for a deeper analysis: