Ballast Water Management Convention In Depth
MEPC 84 approved draft BWM amendments for possible adoption at MEPC 85, but adopted the 2026 G4 Guidelines through MEPC.409(84): the two statuses remain distinct.
Operational Explanation
MEPC 84 approved draft BWM amendments for possible adoption at MEPC 85, but adopted the 2026 G4 Guidelines through MEPC.409(84): the two statuses remain distinct.
Regulatory Reference
BWM Convention; MEPC.409(84) adopted G4; draft amendments approved, not adopted.
Scope of Application
MEPC.325(75) commissioning testing remains current; future survey/performance-test provisions are not yet mandatory.
Procedure / How to Complete It
- Apply the current BWM Plan and BWMS Code.
- Use MEPC.409(84) to develop/update the Plan.
- Label MEPC 84 drafts not yet adopted.
- Do not fix May 2028 before adoption.
- Recheck after MEPC 85.
Practical Example
The ship continues current surveys; a possible annual performance test is tracked as a draft future change.
What Typically Goes Wrong
Writing from now on, annual survey performance test from 2028, or merging adopted G4 with draft amendments.
Common Mistakes Mistake Library
| Mistake | Consequence | How to Avoid It |
|---|---|---|
| Writing from now on, annual survey performance test from 2028, or merging adopted G4 with draft amendments. | Non-compliant decision or treatment | Follow the approved arrangement and applicable sources |
What the PSCO Checks
Operational Tips
- Separate current requirement, class/maker, SMS and voluntary guidance.
- Do not improvise tests, thresholds or intervals.
- Record deviations and corrective action.
Preparation checklist
- G4 adopted
- Draft status
- Commissioning test distinct
- No fixed 2028 date
FAQ
Related Topics
Last substantive revision of this page: 31 August 2026 · page fingerprint 2ded5ee704c2