This certification is retired. In abeyance: GIAC says 'no longer available for purchase'; renewal $199. SANS SEC460 (historical).
No formal prerequisites are published; anyone can register for the exam.
Valid for 4 years, 36 CPE credits per cycle, $479 renewal fee. Renew by cpe.
Renewal fee is due at the end of the 4-year cycle. You can also renew by retaking the exam.
Former GIAC vulnerability-assessment cert (SANS SEC460); holders can still renew but it is no longer sold.