This document discusses regulations from MARPOL Annex VI Chapter IV regarding greenhouse gas emissions and energy efficiency from ships. It provides details on the Energy Efficiency Design Index (EEDI) which sets mandatory reduction targets for carbon intensity from new ships. The EEDI must be calculated and verified according to IMO guidelines and reductions are implemented in phases, with more stringent targets starting in 2015 and becoming mandatory through 2025. Requirements include attaining the EEDI value and developing and implementing a Ship Energy Efficiency Management Plan.