In a Chapter 9 or 11 case, after a plan has been accepted and before confirmation, the plan proponent may file a modification. The modification is considered accepted by any creditor or equity security holder who has accepted it in writing. For others who have not accepted it in writing but have accepted the plan, the modification is considered accepted if, after notice and a hearing, the court finds that it does not adversely change the treatment of their claims or interests. The notice must be served on:
• the trustee;
• any appointed committee; and
• any other entity the court designates.