The IMO’s Carbon Intensity Indicator (CII) reduction factors used to determine the required annual operational CII for ships of 5,000gt and above, have been set through to 2030.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:
| Year | Reduction Factor (Z) |
|---|---|
| 2027 | 13.625% |
| 2028 | 16.250% |
| 2029 | 18.875% |
| 2030 | 21.500% |






