Irreconcilable differences have caused the irretrievable breakdown of the marriage and the court determines that efforts at reconciliation have failed or that future attempts at reconciliation would be impracticable and not in the best interests of the family.
The death of a party subsequent to entry of a judgment for dissolution but before judgment on reserved issues shall not abate the proceedings.
If any provision of this Section or its application shall be adjudged unconstitutional or invalid for any reason by any court of competent jurisdiction, that judgment shall not impair, affect or invalidate any other provision or application of this Section, which shall remain in full force and effect.
750 ILCS 5/401