DNV, a classification society, has released updated rules for the classification of ships and offshore structures, emphasizing the adoption of decarbonization technologies. The new in-operation class notations aim to provide clarity to class customers regarding design and operational requirements. They enable owners and operators to showcase their differentiation in the market through advanced procedures and reporting processes, enhancing safety and efficiency. DNV's framework introduces Fleet in service notations, distinguishing responsibilities between yards during the building phase and owners/operators in the operational phase. Additionally, the rules promote innovation by including class notations for Gas fuelled hydrogen and OCCS for carbon capture and storage onboard vessels. The Gas fuelled hydrogen notation facilitates the practical development of hydrogen-fuelled newbuildings, despite the lack of international regulations covering hydrogen as a zero-carbon fuel for shipping. On the other hand, OCCS systems offer vessels the opportunity to reduce emissions and enhance sustainability. Key requirements of the OCCS notation cover exhaust treatment, absorption, CO2 storage, and more. Other highlights of the updated rules include notations for boil-off gas systems, live fish transport, stability pontoons, and new qualifiers like “NC” for Hatchcoverless vessels and “EV” for Additional fire safety targeting vessels transporting electric vehicles. The rules also address diving systems aligned with the IMO 2023 diving code. The rules were officially published on July 1st and are scheduled to be enforced starting January 1st, 2025. By setting new standards and requirements, DNV's updated classification rules aim to propel the maritime industry towards a more sustainable and innovative future.