Who makes decision to require an IS to under re-accreditation based on security status reporting & documentation & recommendation of Designated Rep & IT security staff? Response:

The Authorizing Official (AO) is the senior management official with the authority to formally assume responsibility for operating an information system at an acceptable level of risk to the organization. Based on security status reports, documentation, and recommendations from security staff, the AO makes the critical decision to grant, deny, or revoke the authorization to operate (which includes re-accreditation) for an information system.

The Information System Owner (ISO) is responsible for the overall procurement, development, integration, modification, and operation of a system, but typically doesn't hold the ultimate authority for authorization decisions.

Industry Standard Architecture (ISA) refers to common design patterns or specifications, not a role involved in accreditation decisions.

The Information Systems Security Officer (ISSO) is responsible for the day-to-day security posture of a system and provides recommendations, but does not make the final authorization decision.