IOPP Certificate: the Supplement is the document that matters
Read the IOPP certificate and supplement together: the former records certification, the latter describes construction and equipment relevant to oil pollution prevention.
Operational Explanation
The supplement must remain attached to the certificate. Form A covers ships other than oil tankers; Form B covers oil tankers and ships with cargo tanks falling under regulation 2.2. Check the certified category rather than selecting a form from the ship’s commercial description alone.
Regulatory Reference
MARPOL Annex I, regulations 6–10 and Appendix II is the base text adopted by MEPC.117(52), to be read with applicable amendments; do not use the old specimen as a current form without verification. HSSC 2025.
Scope of Application
Regulation 7 covers oil tankers from 150 GT and other ships from 400 GT trading to ports or offshore terminals under other Parties’ jurisdiction. Absence of an international IOPP requirement does not exempt a ship from all Annex I provisions; also check the national regime.
Procedure / How to Complete It
- Check identity, validity, surveys and the relevant supplement.
- Compare completed entries with the separator, alarm, automatic stopping device and arrangements actually required.
- Compare tank identification and capacities with approved drawings and records.
- Refer changes or discrepancies to flag/RO; do not amend the certified document unilaterally.
- Retain the certificate, updated supplement and reports supporting changes.
Practical Example
After equipment replacement, compare configuration and documentation with the supplement. The invoice does not establish that the change was verified and reflected in certification.
What Typically Goes Wrong
Checking only expiry, using an outdated supplement or assuming a domestic ship is outside MARPOL.
Common Mistakes Mistake Library
| Mistake | How to avoid it |
|---|---|
| Checking only expiry, using an outdated supplement or assuming a domestic ship is outside MARPOL. | Check the individual ship’s requirements and documents before closing the work. |
What the PSCO Checks
Operational Tips
- Retain complete documents and current versions.
- Record action owners and deadlines.
- Check consistency between documents and actual condition.
Preparation checklist
- Applicability checked
- Documents and records available
- Survey status checked
- Changes and findings managed
- Acceptance evidence retained
FAQ
Related Topics
Last substantive revision of this page: 15 September 2026 · page fingerprint bf87abdc2380