The European Sea Ports Organization (ESPO) and the Federation of European Private Port Companies and Terminals (FEPORT) are actively advocating for a mandatory EU-wide tax exemption for onshore power supply (OPS), commonly known as cold ironing, as part of the ongoing revisions to the Energy Taxation Directive (ETD). Cold ironing allows vessels to connect to the electrical grid while docked, enabling them to turn off their engines and significantly reduce emissions of harmful pollutants, such as nitrogen oxides (NOx) and particulate matter. This practice not only improves air quality in and around ports but also aligns with the European Union's broader climate goals, which aim to cut greenhouse gas emissions and promote the use of renewable energy. ESPO and FEPORT argue that implementing a uniform tax exemption across all EU member states will create a level playing field for ports investing in green technologies and infrastructure. Currently, the lack of consistent regulations can hinder some ports from adopting OPS systems due to the financial burden of energy taxes. A tax exemption would alleviate this barrier, encouraging more ports to implement sustainable practices and enhance their operational efficiency. Moreover, the organizations emphasize that a strong commitment to cold ironing can attract shipping companies seeking to reduce their carbon footprint, thereby boosting the competitiveness of European ports in the global shipping industry. This initiative would not only benefit the environment but also enhance the economic viability of ports by fostering a greener, more efficient maritime transport system. By advocating for this tax exemption, ESPO and FEPORT are positioning European ports as leaders in sustainability, helping to drive the maritime industry toward a more eco-friendly future while supporting the EU's ambitions for a greener economy. Their call to action reflects a proactive approach to balancing environmental responsibilities with the economic realities of modern shipping.