This excerpt taken from the SDXC 8-K filed Mar 31, 2008.
Section 13.7 Amendments and Waivers.
No amendment, modification, termination or waiver of any provision of this Security Agreement, or consent to any departure by the Administrative Agent therefrom, shall be effective unless the same shall be in writing and signed by the Administrative Agent; provided, however, that upon the execution of this Security Agreement by any Additional Grantor, the Administrative Agent and/or such Additional Grantor may update the schedules attached hereto, as necessary. Each Grantor and shall comply with the provisions set forth in Section 9.6 of the Credit Agreement. Each amendment, modification, termination or waiver shall be effective only in the specific instance and for the specific purpose for which it was given.