13/2025: New IMO CII Guidelines require SEEMP Part III revisions

This means that the currently approved Ship Energy Efficiency Management Plans (SEEMP) Part III now needs to be revised to include an implementation plan addressing these new factors and then resubmitted for approval.

This is the result of the IMO having adopted Amendments to the 2021 Guidelines on the Operational Carbon Intensity Reduction Factors Relative to Reference Lines (CII Reduction Factors Guidelines, G3) (Resolution MEPC.338(76)) (MEPC.400(83)), which introduces reduction factors (Z) for the required annual operational CII for the years 2027, 2028, 2029 and 2030.

These reduction factors (Z) for the CII relative to the 2019 reference lines are:

SEEMP Part III revisions required

Ships which currently have an approved SEEMP Part III (Ship Operational Carbon Intensity Plan) will need to have this revised to include an implementation plan demonstrating how the required CII will be met for the three year- period 2026- 2028, as per the Guidelines for the Verification and Company Audits by the Administration of Part III of the Ship Energy Efficiency Management Plan (SEEMP) (MEPC.347(78)). 

Deadlines for revised SEEMP Part III 

The revised SEEMP Part III, which must include the implementation plan for the 2026-2028 period and the required annual operation CII, needs to be amended and approved by 31 December 2025. Lloyd’s Register (LR) requests shipowners and managers to submit their plans on or before 30 October 2025. This is to enable LR to guarantee approval and issuance of the Confirmation of Compliance required by MARPOL Annex VI Regulation 5 on behalf of the ship’s flag Administration before 1 January 2026.

New ships which are now entering into service, and existing ships for which a new SEEMP Part III is being developed resulting from change in Management Company or Flag, or both, can include the implementation plan extended to 2028 to avoid reapproval again before 31 December 2025.

LR Emissions Verifier Plan Generator 

This is available to prepare the new/revised SEEMP Part III for your fleet. 

Learn more about Emissions Verifier

For further information

If you would like more details or need support, please contact dcsmrv@lr.org.