ISACA HPの"Maintain Your CISA"を見ると:
(http://www.isaca.org/Certification/CISA-Certified-Information-Systems-Auditor/Pages/Maintain-Your-CISA.aspx)
Revocation
CISAs who fail to comply with the CISA CPE Policy will have their CISA credential revoked and will no longer be allowed to present themselves as a CISA. Individuals who have their CISA certification revoked will be required to take and pass the CISA exam and submit a completed application for CISA certification.
Reconsideration and Appeal
CISAs who have had their certification revoked due to non-compliance with certification requirements may appeal such revocation by submitting a written request to ISACA headquarters. This request must be received no later than sixty (60) days after notice of revocation and include a detailed explanation for the appeal.