Notwithstanding
section 510(a) of this title, if all of the applicable requirements of
section 1129(a) of this title, other than paragraphs (8), (10), and (15) of that section, are met with respect to a plan, the court, on request of the debtor, shall confirm the plan notwithstanding the requirements of such paragraphs if the plan does not discriminate unfairly, and is fair and equitable, with respect to each class of claims or interests that is impaired under, and has not accepted, the plan.