IACS UR Z17 Audit Preparation for Inspection Companies
A IACS UR Z17 audit runs in 6 stages, beginning with application to an iacs member society for a named service category listed.. International Association of Classification Societies (IACS); applied and enforced by each IACS Member class society tests the system by sampling finished work backwards to the records behind it, so preparation means reconciling records to jobs rather than rewriting manuals.
UR Z17 sets the minimum requirements every IACS member society applies before it will accept a service supplier's results. The firm — not the individual technician — is approved. It must submit a company outline, personnel and equipment records, work procedures, training programmes, report formats and a quality manual; pass a document review; pass an on-site audit; and pass a practical demonstration of the actual service. Approval is granted per service category and per station: where a company owns several servicing stations, each is assessed and approved separately. Subcontractors performing the approved service must themselves meet Section 5. Every report issued must include a copy of the Certificate of Approval. What separates firms that clear an audit from firms that collect findings is not the quality of the documentation but whether it describes what actually happens. The finding recorded most often is: Operator or supervisor certificates on file do not cover the method or level the relevant Annex 1 category requires
Source: IACS UR Z17 Rev.21, January 2025 — full 41-page text (Sections 1–9 plus Annex 1) read clause by clause from the ClassNK-hosted copy of the IACS requirement. The revision history in that text records Rev.19 and Rev.20 for uniform implementation by IACS Societies from 1 January 2026 and Rev.21 from 1 July 2026. Verified August 2026.
| Stage | What happens | What it tests |
|---|---|---|
| Stage 1 | Application to an IACS member society for a named service category listed in Annex 1 | Where the paperwork is tested against itself |
| Stage 2 | Document review of the 5.1.1 submission — quality manual, work procedures, personnel and equipment records | Where the paperwork is tested against practice |
| Stage 3 | On-site audit under 5. | Where the paperwork is tested against practice |
| Stage 4 | Practical demonstration of the specific service under 5. | Where the paperwork is tested against practice |
| Stage 5 | Issue of a Certificate of Approval under 6.1 stating the type and scope of services and any limitations or restrictions | Where the paperwork is tested against practice |
| Stage 6 | Renewal or endorsement audit under 6.2; any alteration to the certified service operating system must be reported immediately (Section 7) | Where the paperwork is tested against practice |
| Renewal | Renewal or endorsement of the Certificate of Approval at intervals not exceeding five years by verification audit (6.2), or on expiry of the supplier's manufacturer approval where that applies, whichever comes first. For firms engaged in thickness measurements the interval must not exceed three years. Individual societies may impose shorter intervals and intermediate audits; failure to undergo a required intermediate audit is listed as grounds for cancellation under 8.2.4. | Diarised from the certificate date, not the last audit |
How long does IACS UR Z17 audit preparation take?
Document work — the written practice, procedures and quality manual — takes weeks. What cannot be compressed is documented experience and records history: on-the-job hours accrue in real time, and calibration and certification history cannot be back-filled. Firms that start when the audit is scheduled rather than announced clear it without findings.
What does International Association of Classification Societies (IACS); applied and enforced by each IACS Member class society look at first?
Records, not manuals. A manual states intent; records show practice. The usual opening move is to take a completed job and trace it back to the technician's certification, the instrument's calibration, the approved procedure and the report — and see whether all four reconcile.
What are the most common IACS UR Z17 findings?
Operator or supervisor certificates on file do not cover the method or level the relevant Annex 1 category requires, No evidence of the minimum one year of tutored on-the-job training for operators required by 5.2.2, Equipment records missing maintenance history or the results of calibration and verification (5.2.5), Reports issued without a copy of the Certificate of Approval attached, which 5.2.11 requires. Almost all of them are evidence problems rather than capability problems: the work was done correctly and the proof was not kept, or was kept somewhere the firm could not retrieve during the audit.
Can a consultant attend the IACS UR Z17 audit?
Yes, and it changes the outcome. Someone who has sat through the same audit at other firms answers in the auditor's own terms, produces the right record without a search, and stops a clarification turning into a finding. The firm still owns every answer — the consultant does not speak for it.
What happens after a IACS UR Z17 finding?
A corrective action with a deadline, and evidence of closure at the next audit. Repeat findings are treated far more seriously than first ones, because they show the corrective-action system itself is not working.
Does IACS UR Z17 require a pre-audit or gap assessment?
Not as a requirement, but the arithmetic favours it: a gap assessment finds the same evidence problems the auditor would, without the finding attached, and while there is still time to fix them. Firms entering their first IACS UR Z17 audit blind typically collect findings that a sampling exercise would have caught.
What the auditor asks to see
- Outline of company — organisation and management structure, including subsidiaries to be covered by the approval
- List of nominated agents, subsidiaries and subcontractors
- List of operators/technicians/inspectors documenting training, experience and qualifications to recognised national, international or industry standards
- Description of the equipment used for the service, plus a guide for operators of that equipment
- Training programmes for operators/technicians/inspectors
- Check lists and record formats for recording the results of the services referred to in Annex 1
- Quality Manual and/or documented procedures covering the items listed in 5.5
- Documented procedures for communication with the crew before commencing work, so equipment can be safely decommissioned
- Record of customer claims and of corrective actions requested by certification bodies
- Operators' documented acknowledgement of the code of conduct
Findings to close before the audit
- Operator or supervisor certificates on file do not cover the method or level the relevant Annex 1 category requires
- No evidence of the minimum one year of tutored on-the-job training for operators required by 5.2.2
- Equipment records missing maintenance history or the results of calibration and verification (5.2.5)
- Reports issued without a copy of the Certificate of Approval attached, which 5.2.11 requires
- Subcontractors used on approved work with no evidence they meet the requirements of Section 5 (5.2.9)
- Thickness measurement or reporting software not documented and confirmed as fit for the intended application before first use (5.2.6)
- Alterations to the certified service operating system — new offices, new operators, revised procedures — not notified to the society (Section 7)
- A second servicing station operating under the parent certificate without having been separately assessed and approved (5.2.7)
Related: the IACS UR Z17 overview, outsourced ASNT Level III cover, written practice development, NDT procedure development, a programme gap assessment, interim Level III cover.