Authorizing a defendant who seeks a court to change a criminal sentence to file a specified motion within 90 days; limiting the courts' revisory power over sentencing to 15 months; requiring a decision that changes the original sentence to be in writing and state the reasons for the decision; allowing a motion to be filed at any time in a case involving an illegal sentence, fraud, a mistake, or an irregularity; and requiring the court to notify all the defendant's victims prior to changing the sentence.