((a)) The Securities and Exchange Commission may raise and may appear and be heard on any issue in a case under this chapter, but the Securities and Exchange Commission may not appeal from any judgment, order, or decree entered in the case.

((b)) A party in interest, including the debtor, the trustee, a creditors’ committee, an equity security holders’ committee, a creditor, an equity security holder, or any indenture trustee, may raise and may appear and be heard on any issue in a case under this chapter.