Except with respect to abandonment under section
1170 of this title, or merger, modification of the financial structure of the debtor, or issuance or sale of securities under a plan, the trustee and the debtor are subject to the provisions of subtitle
IV of title
49 that are applicable to railroads, and the trustee is subject to orders of any Federal, State, or local regulatory body to the same extent as the debtor would be if a petition commencing the case under this chapter had not been filed, but—