This excerpt taken from the GIS 8-K filed Apr 11, 2007.
SECTION 14.03. Execution of Supplemental Indentures.
In executing, or accepting the additional trusts created by any supplemental indenture permitted by this Article or the modifications thereby of the trusts created by this Indenture, the Trustee shall receive, and (subject to Section 8.01) shall be fully protected in relying upon, an Officers Certificate and an Opinion of Counsel stating that the execution and delivery of such supplemental indenture is authorized or permitted by this Indenture. The Trustee may, but shall not be obligated to, enter into any such supplemental indenture which affects the Trustees own rights, duties or immunities under this Indenture or otherwise.