The Dent Act was a law that was passed after the death of Harvey Dent. It was a law that was so effective that it wiped out organized crime by locking up all 1000 criminals in Gotham City for eight years after the Joker's reign of terror upon Gotham City as well as the death of Dent himself. The law, in part, allowed for gender separation in prisons to cease as well as create stricter penalties. Its main feature denied parole to the men Dent's prosecution locked up. Thus, all the 549 mobsters Dent locked up would be off the streets for good, along with any criminal that tries to restart the organized crime machine.