Why you ask?
DOD Directive 8570.
DoD Directive 8570.1 was approved in December 2005 and requires DoD IA workers to obtain a commercial certification accredited under ISO/IEC standard 17024. ISACA's Certified Information Systems Auditor (CISA) and Certified Information Security Manager (CISM) certifications, accredited by the American National Standards Institute (ANSI), are among only 13 certifications approved by the DoD.
Apparently SANS has to meet this mark by the end of 2007.
I still don't agree with it. It sounds like SANS is really making it difficult for the non-.gov/.mil folks.
In the interest of full disclosure though, I did get my cert while I was .mil. However, now I am not. It still sucks.