Altering the Secured Indebtedness. The holders of the Secured Indebtedness have the right to extend, renew, modify or amend the terms of the Secured Indebtedness or any security therefor and to release, sell or exchange such security and otherwise to deal freely with the Corporation, all without notice to or consent of the Debentureholders or the Trustee and without affecting the liabilities and obligations of the parties to this Indenture or the Debentureholders.