Ongoing Compliance Review Frequency: A Comprehensive Guide for CGRC Exam Preparation
Understanding Ongoing Compliance Review Frequency
Ongoing compliance review frequency refers to the scheduled intervals at which an organization systematically evaluates its information systems, security controls, and operational processes to ensure they remain in compliance with applicable laws, regulations, standards, policies, and contractual obligations. This concept is a cornerstone of the compliance maintenance domain within the CGRC (Certified in Governance, Risk, and Compliance) body of knowledge.
Why Is Ongoing Compliance Review Frequency Important?
Compliance is not a one-time event — it is a continuous process. Organizations that treat compliance as a checkbox exercise inevitably fall out of alignment with regulatory requirements, exposing themselves to significant risks. Here is why ongoing compliance review frequency matters:
1. Regulatory and Legal Requirements: Many regulations (such as FISMA, HIPAA, PCI DSS, and SOX) explicitly mandate periodic reviews of compliance posture. Failure to conduct these reviews at the required frequency can result in fines, sanctions, or loss of authorization to operate.
2. Evolving Threat Landscape: The cybersecurity threat environment changes constantly. Controls that were effective six months ago may no longer be adequate. Regular reviews ensure that controls are adapted to current threats.
3. Organizational Changes: Mergers, acquisitions, new systems, personnel changes, and shifts in business processes can all impact compliance. Periodic reviews catch these gaps before they become vulnerabilities.
4. Continuous Authorization: Under modern frameworks like NIST RMF (Risk Management Framework), ongoing authorization replaces the traditional three-year reauthorization cycle. This requires continuous monitoring and review at defined frequencies.
5. Accountability and Due Diligence: Demonstrating a regular cadence of compliance reviews shows stakeholders, auditors, and regulators that the organization exercises due diligence in managing risk.
6. Cost Efficiency: Identifying compliance drift early through regular reviews is far less costly than remediating issues discovered during an audit or, worse, after a security incident.
What Is Ongoing Compliance Review Frequency?
At its core, ongoing compliance review frequency defines how often an organization reviews its compliance posture across various domains. This includes:
- Control Assessment Frequency: How often individual security controls are tested and evaluated. Some controls may be assessed annually, while others (especially high-impact or volatile controls) may be assessed quarterly or even continuously.
- Policy and Procedure Review: The cadence at which organizational policies, procedures, and standards are reviewed and updated to reflect current regulatory requirements and operational realities.
- System and Configuration Reviews: How often system configurations, baselines, and technical implementations are checked for compliance with established standards.
- Audit and Assessment Schedules: The frequency of internal audits, external audits, penetration tests, vulnerability assessments, and third-party assessments.
- Plan of Action and Milestones (POA&M) Reviews: How often outstanding remediation items are reviewed for progress and closure.
- Risk Assessment Updates: The frequency at which organizational and system-level risk assessments are refreshed.
Key Factors That Determine Review Frequency
The appropriate frequency of ongoing compliance reviews is not one-size-fits-all. Several factors influence the determination:
1. System Categorization (Impact Level): Systems categorized as high-impact under FIPS 199 or similar frameworks require more frequent reviews than low-impact systems. A high-impact system might require monthly or quarterly control assessments, while a low-impact system might be reviewed annually.
2. Regulatory Requirements: Specific regulations may dictate minimum review frequencies. For example, PCI DSS requires quarterly vulnerability scans by an Approved Scanning Vendor (ASV) and annual penetration testing.
3. Risk Tolerance: Organizations with lower risk tolerance will conduct reviews more frequently to minimize exposure.
4. Control Volatility: Controls that are more susceptible to change (e.g., access control lists, patch levels) should be reviewed more frequently than stable controls (e.g., physical security measures in a data center).
5. Threat Intelligence: Emerging threats or newly discovered vulnerabilities may trigger out-of-cycle reviews.
6. Previous Findings: If prior reviews identified significant weaknesses, follow-up reviews should be scheduled more frequently until issues are resolved.
7. Organizational Changes: Major changes to infrastructure, personnel, business processes, or mission objectives may necessitate accelerated review cycles.
8. Authorizing Official (AO) Direction: The AO may specify review frequencies as part of the authorization decision or continuous monitoring strategy.
How Ongoing Compliance Review Frequency Works in Practice
The process of establishing and executing ongoing compliance reviews typically follows these steps:
Step 1: Develop a Continuous Monitoring Strategy
The organization, in collaboration with the Authorizing Official and Information System Security Officer (ISSO), develops a continuous monitoring strategy that defines the frequency of reviews for different control families, system types, and compliance domains. This strategy is documented in the Continuous Monitoring Plan or the System Security Plan (SSP).
Step 2: Establish a Control Assessment Schedule
Based on the monitoring strategy, a detailed schedule is created that specifies which controls will be assessed in each review cycle. For example, using NIST SP 800-53 controls, an organization might rotate through all control families over a three-year period, ensuring every control is assessed at least once within that timeframe, while high-priority controls are assessed annually or more frequently.
Step 3: Execute Assessments
At the defined intervals, assessors (internal or external) perform control assessments using established assessment procedures (e.g., NIST SP 800-53A). This includes interviews, examinations, and testing of controls.
Step 4: Document and Report Findings
Assessment results are documented in Security Assessment Reports (SARs). Deficiencies are captured in the Plan of Action and Milestones (POA&M) for tracking and remediation.
Step 5: Review and Update Risk Posture
Based on assessment findings, the organization updates its risk assessment and determines whether the residual risk remains acceptable. The AO is briefed on changes to the risk posture.
Step 6: Adjust Frequency as Needed
If assessments reveal significant or recurring issues, the review frequency may be increased. Conversely, if a control consistently demonstrates effectiveness over multiple review cycles, the frequency might be reduced (with AO approval).
Step 7: Report to Stakeholders
Compliance status and review results are communicated to relevant stakeholders including senior leadership, governance bodies, and regulatory authorities as required.
Frameworks and Standards That Address Review Frequency
- NIST RMF (SP 800-37): Step 6 (Monitor) explicitly requires ongoing monitoring of security controls at a frequency defined in the continuous monitoring strategy.
- NIST SP 800-137: Provides guidance on Information Security Continuous Monitoring (ISCM), including how to determine appropriate monitoring frequencies.
- FISMA: Requires federal agencies to conduct annual security reviews and ongoing monitoring of information systems.
- PCI DSS: Specifies exact frequencies for various compliance activities (quarterly scans, annual assessments, daily log reviews, etc.).
- ISO 27001: Requires periodic internal audits and management reviews of the Information Security Management System (ISMS).
- FedRAMP: Requires monthly vulnerability scanning, annual penetration testing, and ongoing authorization with continuous monitoring.
Common Review Frequency Categories
- Continuous/Real-Time: Automated monitoring tools that provide ongoing visibility (e.g., SIEM systems, automated vulnerability scanners, configuration management tools).
- Daily: Log reviews, intrusion detection monitoring, backup verification.
- Weekly/Monthly: Vulnerability scanning, patch compliance checks, access review reports, POA&M status updates.
- Quarterly: External vulnerability scans (PCI DSS), control subset assessments, risk review meetings.
- Semi-Annual: Policy reviews, tabletop exercises, business continuity plan updates.
- Annual: Full security assessments, penetration testing, risk assessment refresh, policy and procedure comprehensive review, contingency plan testing.
- Triennial (Every Three Years): Traditional full reauthorization cycle (though this is being replaced by continuous monitoring approaches in many frameworks).
- Event-Driven: Triggered by significant changes, incidents, or new threat intelligence — not tied to a fixed schedule.
The Role of the CGRC Professional
As a CGRC-certified professional, you play a critical role in:
- Advising stakeholders on appropriate review frequencies based on risk, regulatory requirements, and organizational context.
- Developing and maintaining continuous monitoring strategies and schedules.
- Ensuring that reviews are conducted as planned and that findings are properly documented and communicated.
- Recommending adjustments to review frequency based on changing conditions.
- Facilitating communication between technical teams, management, and authorizing officials regarding compliance status.
- Ensuring that POA&M items are tracked and remediated within acceptable timeframes.
Exam Tips: Answering Questions on Ongoing Compliance Review Frequency
When you encounter exam questions related to this topic, keep the following strategies and key concepts in mind:
1. Risk-Based Approach Is Always the Answer: When a question asks how to determine review frequency, the best answer will almost always involve a risk-based approach. Higher risk = more frequent reviews. The frequency should be commensurate with the impact level of the system and the volatility of the controls.
2. Know the NIST Framework Steps: Understand that ongoing compliance review is part of Step 6 (Monitor) of the NIST RMF. Questions may test whether you know where this activity falls in the lifecycle.
3. Continuous Monitoring ≠ Continuous Assessment: Be careful with terminology. Continuous monitoring refers to maintaining ongoing awareness of security posture, but it does not mean every control is assessed every day. Controls are assessed on a rotating schedule at defined frequencies.
4. Understand Who Sets the Frequency: The Authorizing Official (AO), in coordination with the ISSO and system owner, typically approves the monitoring frequency. If a question asks who is responsible for determining review frequency, look for the AO or the continuous monitoring strategy as the answer.
5. Event-Driven Reviews Supplement Scheduled Reviews: Significant changes (e.g., a major system upgrade, a security incident, or a change in regulation) can trigger an out-of-cycle review. This does not replace the scheduled frequency but supplements it.
6. Know Specific Regulatory Frequencies: Be familiar with commonly tested frequencies: PCI DSS quarterly external scans, FISMA annual reviews, FedRAMP monthly OS scanning. If a question references a specific standard, recall its mandated frequencies.
7. POA&M Is Key: Many questions will connect review frequency to POA&M management. Understand that POA&M items discovered during reviews must be tracked, assigned, and remediated. The review frequency determines how quickly drift is detected.
8. Automation Enables Higher Frequency: When questions ask how to increase review frequency without proportionally increasing cost, the answer is typically automation — automated scanning tools, SIEM, configuration management databases (CMDBs), and dashboards.
9. Look for the Most Complete Answer: If multiple answer choices seem correct, choose the one that is most comprehensive. For example, an answer that includes "based on system impact level, control volatility, regulatory requirements, and organizational risk tolerance" is better than one that mentions only one factor.
10. Distinguish Between Assessment Types: The exam may ask about different types of reviews (vulnerability scans vs. full security assessments vs. penetration tests). Each has different typical frequencies, and you should know which is conducted more or less often.
11. Traps to Avoid:
- Do not assume that more frequent reviews are always better — there must be a balance between thoroughness and resource constraints, guided by risk.
- Do not confuse the review frequency with the remediation timeline. Just because a control is reviewed annually does not mean a finding can wait a year to be fixed.
- Do not select answers that suggest compliance reviews are only conducted during initial authorization — ongoing review is a continuous lifecycle activity.
12. Scenario-Based Questions: For scenario questions, read carefully to identify the system's impact level, the organization's regulatory environment, and any triggering events. These clues will guide you to the correct review frequency answer.
13. Remember the Hierarchy: Organizational-level monitoring strategy → System-level continuous monitoring plan → Individual control assessment schedules. Questions may test whether you understand this hierarchy.
14. Documentation Matters: The correct answer often emphasizes that the review frequency must be documented in the continuous monitoring strategy or the SSP. Simply conducting reviews without documentation does not demonstrate compliance.
15. Stakeholder Communication: Review results must be communicated to the AO and other stakeholders in a timely manner. If a question asks about the next step after completing a review, reporting findings to the appropriate authority is typically the correct answer.
Summary
Ongoing compliance review frequency is a foundational concept in governance, risk, and compliance management. It ensures that an organization's security controls and compliance posture remain effective and aligned with regulatory requirements over time. The frequency is determined by a risk-based approach, considering system impact levels, regulatory mandates, control volatility, and organizational context. For the CGRC exam, focus on understanding the risk-based rationale for setting frequencies, the roles and responsibilities involved, the relationship to continuous monitoring strategies, and the distinction between scheduled and event-driven reviews. Mastery of this topic demonstrates your ability to ensure that compliance is maintained as an ongoing, dynamic process rather than a static, point-in-time activity.
