1. By 2 June 2030, the Commission shall adopt implementing acts, to ensure that a user-friendly, free of charge, simplified EU calculation tool facilitating calculations based on primary data and enabling the use of default values for greenhouse gas emission intensities, where available and relevant, and of default values for greenhouse gas emission factors, in accordance with Article 4(3), points (a) and (b), respectively, is made publicly accessible to transport operators and is designed to support particularly micro, small and medium-sized transport operators. That EU calculation tool shall be updated periodically. Those implementing acts shall be adopted in accordance with the examination procedure referred to in Article 18(2).