This Settlement Agreement may be modified or amended only by written agreement executed by # the Required TCEH Creditor Parties, # all of the undersigned Settling Interest Holders, # the Debtors and # the TCEH Official Committee; provided, however, that if the proposed modification, amendment, or supplement has a material, disproportionate, and adverse effect on any Settling Creditor (in its capacity as a TCEH First Lien Creditor, holder of TCEH Unsecured Note Claims, or holder of TCEH Second Lien Note Claims), then the consent of each such disproportionately affected Settling Creditor shall also be required to effectuate such modification, amendment, or supplement.