Understanding Non-Conformity Grading in ASC Farm Audits

Understanding non-conformity grading and the CAR framework

The Aquaculture Stewardship Council relies on independent third-party audits conducted by accredited conformity assessment bodies to verify that aquaculture operations comply with the ASC Farm Standard. When an auditor identifies a failure to conform with a standard indicator, normative requirement, or administrative rule, the finding is formally recorded as a non-conformity. Grading non-conformities objectively ensures consistent enforcement, protects supply chain integrity, and provides farm management with clear escalation pathways to address operational deficiencies.

The governance framework for grading non-conformities is set out in Appendix 2 of the ASC Farm and Feed Certification and Accreditation Requirements. Auditors evaluate every finding against standardized criteria defined in CAR Table 2.1 for individual sites and CAR Table 2.2 for group management systems. The non-conformity detection date is established as the date of the audit closing meeting, where all findings are formally presented to senior management.

Quality managers, compliance leads, and internal auditors must understand that non-conformity grading directly dictates closure timelines, evidence requirements, and potential certification sanctions. Failing to address a minor finding can trigger an automatic upgrade to a major non-conformity, while critical findings result in immediate site or certificate suspension. Integrating CAR grading logic into internal audit programs enables operations to identify, grade, and remediate compliance gaps before external certification audits occur.

Evaluating Minor, Major, and Critical non-conformity criteria

Auditors categorize findings into three distinct severity levels based on the spatial scale, temporal duration, and systemic impact of the failure. Understanding the boundaries between Minor, Major, and Critical non-conformities allows compliance teams to prioritize corrective resources effectively.

A Minor non-conformity represents an isolated lapse or single observed failure that does not result in the total breakdown of a system or process. The environmental, social, or operational impacts of a minor finding are strictly limited in temporal and spatial scale and do not significantly compromise the overall conformity of the farm. Under CAR Table 2.2, a Group Minor non-conformity denotes an isolated failure within a central Internal Management System that does not cause widespread non-compliance across group sites.

A Major non-conformity reflects a substantial failure likely to have a significant negative impact on standard conformity. Major findings occur when a core process or system breaks down completely, when a failure is systemic and widespread across the facility, or when an issue recurs over time due to ineffective previous corrective actions. Furthermore, repeating a minor non-conformity under identical circumstances from a previous audit automatically results in a Major non-conformity grade. For group certifications, a Group Major non-conformity indicates the breakdown of a central IMS function that threatens compliance across multiple group sites.

A Critical non-conformity represents the most severe audit finding, indicating an immediate threat to human life, severe human rights violations, or fundamental product integrity fraud. Under CAR Table 2.1, Critical non-conformities include evident risks to employee lives, evidence of child or forced labour, sales or dispatch of non-certified product as ASC certified, or the detection of banned substances, antibiotics in shrimp farming, or WHO Critically Important Antimicrobials in certified product samples. For group operations, a Group Critical non-conformity involves a severe, systemic failure across group sites to conform with the ASC Farm Standard.

Timeframes, extension rules, and corrective action workflows

When an auditor issues a non-conformity, the unit of certification must follow a strict timeline to analyze root causes and implement verified corrective action plans. Under RUoC Requirement 14.2 and CAR Requirement 4.40.1, the client must submit a detailed Corrective Action Plan to the CAB within 28 days of the audit closing meeting. The plan must identify the specific root cause, immediate corrections, and long-term corrective actions to prevent reoccurrence.

The initial closure timeframe for both Minor and Major non-conformities is 3 months from the detection date. However, extension rules differ significantly depending on whether the audit is an initial audit or occurs during the validity period of an existing certificate.

• Conduct a comprehensive root cause analysis for every identified non-conformity within 28 days of the closing meeting, documenting immediate corrections and long-term preventive steps.
• Submit the Corrective Action Plan to the CAB for technical review, ensuring proposed timelines align with normative CAR limits and operational realities.
• Execute approved corrections and compile objective evidence of effective implementation, submitting verification packages to the CAB prior to the 3-month closure deadline.
• If additional time is required during the validity period, submit a formal extension request under CAR Requirement 4.44, demonstrating that extra time is necessary due to species production cycles or circumstances beyond farm control.
• For Critical non-conformities, prepare for a mandatory on-site revisit by CAB auditors to physically verify that implemented corrections have eliminated the critical risk.

Escalation pathways, suspensions, and certificate withdrawal

Failing to meet non-conformity closure deadlines triggers mandatory escalation procedures administered by the CAB. If a Minor non-conformity raised during the validity period of a certificate is not closed or granted an extension within 3 months, CAR Table 2.3 mandates that the CAB automatically upgrade the finding to a Major non-conformity with no further extensions permitted.

When a Major non-conformity remains unclosed or unextended beyond its initial 3-month timeframe, or exceeds its maximum 6-month extension limit, the CAB must immediately suspend the affected site or certificate under CAR Requirement 13.9. Under CAR Requirement 13.11, the CAB establishes a maximum deadline of 6 months from the suspension date for the client to resolve the underlying failure. If the client fails to close the Major non-conformity within the 6-month suspension window, CAR Requirement 13.18 dictates that the CAB must withdraw the certificate.

Critical non-conformities follow an accelerated, high-urgency workflow. Upon detecting a Critical non-conformity, the Lead Auditor must notify the CAB within 24 hours under CAR Table 2.3. The CAB must verify the critical grading within 2 working days and immediately suspend the site or certificate. To close a Critical non-conformity, CAR Requirement 4.45 requires the CAB to conduct an on-site revisit to evaluate verified objective evidence. If a Group Critical non-conformity is raised against an Internal Management System, CAR Requirement 4.45.1 mandates a full on-site audit of the central IMS. If a Critical non-conformity is not closed within permitted timeframes, CAR Requirement 13.18 requires the CAB to withdraw the certificate, prohibiting the client from re-applying for ASC certification for at least 12 months.

Example

During a routine surveillance audit at an ASC-certified sea bass facility, the CAB Lead Auditor discovers that the farm failed to maintain continuous dissolved oxygen monitoring records for three consecutive weeks due to a faulty probe. Because this failure represents an isolated monitoring lapse without total system collapse, the auditor grades the finding as a Minor non-conformity against Indicator 2.6.19. The farm submits a CAP within 28 days detailing probe recalibration and staff retraining. However, due to administrative turnover, the farm fails to submit objective evidence of implementation to the CAB within the 3-month initial closure window. Following CAR Table 2.3, the CAB automatically upgrades the finding to a Major non-conformity. The farm requests a 3-month extension under CAR Requirement 4.44, citing delays in procuring replacement digital logging gear. The CAB approves the extension, and the farm successfully submits calibration logs and training records before the 6-month maximum limit, avoiding site suspension and closing the Major non-conformity.

Before your audit

• Review previous audit reports to confirm that all past Minor and Major non-conformities remain effectively closed.
• Verify that internal audit logs cover all applicable ASC Farm Standard indicators and central IMS functions.
• Check that documented procedures exist to conduct formal root cause analysis using structured problem-solving methods.
• Confirm that Corrective Action Plans can be drafted and submitted to the CAB within 28 days of the audit closing meeting.
• Ensure site safety, HR contracts, and chemical storage records are updated to prevent potential Critical non-conformity findings.
• Verify that batch segregation and sales tracking systems prevent uncertified or scope-excluded products from being sold as ASC certified.
• Review antibiotic usage records and residue test results to ensure complete absence of WHO Critically Important Antimicrobials.

Questions people ask

What is the maximum deadline for submitting a Corrective Action Plan following an ASC audit?

Under RUoC Requirement 14.2 and CAR Requirement 4.40.1, the client must submit a completed Corrective Action Plan detailing root cause analysis, immediate corrections, and preventive actions within 28 days of the audit closing meeting.

What happens if a Minor non-conformity is not closed within 3 months during certificate validity?

Under CAR Table 2.3 and RUoC Requirement 14.7, an unclosed Minor non-conformity raised during certificate validity that has not been granted a formal extension is automatically upgraded to a Major non-conformity with no further extension permitted.

Is an on-site revisit mandatory to close a Critical non-conformity?

Yes. Under CAR Requirement 4.45, the CAB must conduct an on-site revisit to evaluate the effective implementation of corrections and corrective actions before a Critical non-conformity can be closed. For Group Critical non-conformities, CAR Requirement 4.45.1 mandates a full on-site audit of the Internal Management System.

Can a Major non-conformity be extended during an initial certification audit?

No. Under CAR Table 2.3 and Table 3.1, extensions for Major non-conformities are strictly prohibited during initial audits. If a Major non-conformity is not closed within 3 months of an initial audit, the audit is classified as a failed audit and a full re-audit is required.

Reference documents

• ASC Farm Standard V1.0.1A2 - August 2026
• ASC Farm Standard Interpretation Manual V1.0.1 - September 2025
• ASC Farm and Feed CAR V1.0 - May 2025
• ASC Requirements for Units of Certification V1.0.1 - July 2023