No proceedings under this Article shall be commenced more than 6 months after the conclusion of proceedings in the United States Supreme Court, unless the petitioner alleges facts showing that the delay was not due to his or her culpable negligence. If a petition for certiorari is not filed, no proceedings under this Article shall be commenced more than 6 months from the date for filing a certiorari petition, unless the petitioner alleges facts showing that the delay was not due to his or her culpable negligence. If a defendant does not file a direct appeal, the post-conviction petition shall be filed no later than 3 years from the date of conviction, unless the petitioner alleges facts showing that the delay was not due to his or her culpable negligence.
This limitation does not apply to a petition advancing a claim of actual innocence.
725 ILCS 5/122-1