The characteristics of the EEDI, EEXI, and CII regulations on ship energy efficiency and their practical impact on the maritime industry were analyzed. The role of each stakeholder in achieving the original purpose of these regulations was explained in realistic terms.
In particular, it introduces the positive impact of the EEDI regulation on the development of energy efficiency improvement technologies of ships, the limitations of the EEXI regulation, and the interrelationships between stakeholders for effective implementation of the CII regulation.