I believe this is a hot topic nowadays.
Many ship management companies face serious EEXI compliance issues due to global shortage of the necessary hardware mainly for Engine Power Limitation (EPL) systems.
DNV supports an interim EEXI compliance method which is based on continuous power monitoring and data-reported compliance verification.
Pending acceptance by flag, DNV supports issuance of a full-term International Energy Efficiency Certificate (IEEC) in combination with an Interim Exemption Certificate. The Interim Exemption Certificate temporarily exempts the vessel from requirements of the guideline on shaft/engine power limitation system (MEPC.335(76))