Treat CPS 230 as a single operating model, not three parallel programs. Build one auditable evidence trail that links risk assessments, business continuity planning, critical operations, and third-party obligations. The goal is to show how control decisions connect, who owns them, and what happens if a material service provider fails. Separate spreadsheets and documents usually create gaps APRA will notice quickly.
Why This Matters for Security Teams
CPS 230 compliance breaks down when operational risk, business continuity, and third-party oversight are managed as separate workstreams. APRA expects a connected view of critical operations, tolerance limits, and material service providers, so the question is not only whether a control exists, but whether it supports continuity under stress. That means risk owners, business owners, and vendor managers need a shared evidence model, not three different narratives.
This matters because failure modes cross boundaries quickly. A third-party outage can become an operational risk event, trigger continuity activation, and expose gaps in control ownership at the same time. NHI Management Group’s Ultimate Guide to NHIs — Regulatory and Audit Perspectives shows how fragmented identity and governance records undermine audit readiness, while the control logic in NIST Cybersecurity Framework 2.0 reinforces the need to connect identification, protection, detection, response, and recovery. In practice, many security teams discover the silos only after a material service provider disruption forces them to reconcile inconsistent records under time pressure.
How It Works in Practice
The practical goal is to build one CPS 230 operating model that traces a critical operation from dependency mapping through risk treatment, continuity arrangements, and supplier obligations. Start by defining critical operations and the tolerable disruption thresholds that apply to each one. Then link those operations to the processes, systems, data, and third parties they depend on, including any outsourced technology, managed services, and identity or access services that can affect recoverability.
From there, connect each control decision to an owner and an evidence source. A resilient CPS 230 model usually includes:
- a single register of critical operations with documented business impact and service tolerances
- risk assessments that reference continuity dependencies and third-party failure scenarios
- business continuity plans that map directly to the controls used to keep critical operations within tolerance
- material service provider obligations that specify resilience, notification, testing, and exit requirements
- test results, issue logs, and remediation actions tied back to the same operation and owner
This is where governance discipline matters. APRA-regulated organisations should be able to show how a supplier risk assessment changes a continuity plan, how that plan affects incident response, and how the operating owner verifies closure. The Top 10 NHI Issues is relevant here because shared service accounts, API keys, and other non-human identities often sit inside outsourced platforms and can become hidden dependencies unless they are explicitly tracked. Current guidance suggests the evidence trail should read like a chain of custody for resilience, not a document archive.
That approach aligns well with control families in NIST SP 800-53 Rev 5 Security and Privacy Controls, especially where contingency planning, supply chain oversight, and accountability need to be demonstrated together. These controls tend to break down when organisations rely on static vendor due diligence packs and do not test how dependencies behave during an actual disruption.
Common Variations and Edge Cases
Tighter integration often increases governance overhead, requiring organisations to balance auditability against the operational burden of keeping records current. That tradeoff becomes more visible in complex groups, shared service models, and environments with many material service providers. Best practice is evolving, but there is no universal standard for how much detail a CPS 230 register must contain; the safer approach is to capture enough to prove dependency, ownership, and recovery path without creating unmaintainable duplication.
One common edge case is where a third party is not formally designated as material, yet still supports a critical operation through a hidden technical dependency. Another is where continuity plans exist, but test evidence is stored separately from risk acceptance or supplier oversight records, making it hard to prove integrated control design. NHI-related access paths can create a similar problem when service identities are embedded in vendor tooling and are not reviewed as part of supplier risk.
Where this becomes difficult is in environments with frequent change, multi-entity operating models, or offshore providers that cannot support the same evidence cadence as the regulated entity. The Ultimate Guide to NHIs — Lifecycle Processes for Managing NHIs illustrates why lifecycle control matters when access and dependencies move quickly, and the OWASP Non-Human Identity Top 10 is a useful companion for spotting overlooked non-human access paths. In practice, the hardest CPS 230 failures are not missing policies, but missing links between policies, tests, and the real dependency map.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
OWASP Non-Human Identity Top 10 and CSA MAESTRO address the attack and risk surface, while NIST CSF 2.0, NIST SP 800-53 Rev 5 and NIST AI RMF set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST CSF 2.0 | GV.RM-01 | CPS 230 needs a unified risk model across operations and suppliers. |
| NIST SP 800-53 Rev 5 | CP-2 | Continuity planning must be tied to tested recovery actions. |
| OWASP Non-Human Identity Top 10 | NHI-03 | Third-party service identities often hide inside outsourced critical services. |
| NIST AI RMF | GOVERN | APRA-style oversight depends on clear accountability and traceable decisions. |
| CSA MAESTRO | TRUST-03 | Integrated resilience requires trust boundaries across service dependencies. |
Document trust assumptions, dependency links, and recovery expectations for every critical service.
Related resources from NHI Mgmt Group
- Why do third-party ecosystems increase operational resilience risk for regulated organisations?
- Why do AI agents and workflow automations increase operational risk when they interact with business data and third-party tools?
- Why do organisations need to connect risk, compliance, audit, and third-party oversight instead of managing each area separately?
- Why do non-human identities create compliance risk even when policies exist?
