Amendments to the International Convention for the
Prevention of Pollution from Ships (MARPOL) Annex VI entered into force on 1
November 2022. Developed under the framework of the Initial IMO Strategy on
Reduction of GHG Emissions from Ships agreed in 2018, these technical and
operational amendments require ships to improve their energy efficiency in the
short term and thereby reduce their greenhouse gas emissions.
From 1 January 2023 it will be mandatory for all
ships to calculate their attained Energy Efficiency Existing Ship Index (EEXI)
to measure their energy efficiency and to initiate the collection of data for
the reporting of their annual operational carbon intensity indicator (CII) and
What are the new mandatory measures?
As a stimulus to reduce carbon intensity of all
ships by 40% by 2030 compared to 2008 baseline, ships will be required to
calculate two ratings: their attained Energy Efficiency Existing Ship Index
(EEXI) to determine their energy efficiency, and their annual operational
Carbon Intensity Indicator (CII) and associated CII rating. Carbon intensity
links the GHG emissions to the amount of cargo carried over distance travelled.
When do the measures come into force?
The amendments to MARPOL Annex VI are in force from
1 November 2022. The requirements for EEXI and CII certification come into
effect on 1 January 2023. This means that the first annual reporting will be
completed in 2023, with initial ratings given in 2024.
The measures are part of IMO's commitment under its
2018 Initial Strategy on Reduction of GHG Emissions from Ships to reduce carbon
intensity from all ships by 40% by 2030 compared to 2008.
What is an Energy Efficiency Existing Ship Index
A ship's attained EEXI indicates its energy
efficiency compared to a baseline. Ships attained EEXI will then be compared to
a required Energy Efficiency Existing Ship Index based on an applicable
reduction factor expressed as a percentage relative to the Energy Efficiency
Design Index (EEDI) baseline. It must be calculated for ships of 400 gt and
above, in accordance with the different values set for ship types and size
categories. The calculated attained EEXI value for each individual ship must be
below the required EEXI, to ensure the ship meets a minimum energy efficiency