Authorizing an individual to file a petition with the court to reduce the sentence if the individual has served at least 20 years of the term of confinement and at least 5 years have passed since the court decided any previous petition filed by the individual under the Act; authorizing a court, after a hearing, to reduce a sentence if the court finds that the individual is not a danger to the public; and providing a rebuttable presumption that a petitioner is not a danger to the public under certain circumstances.