1. Transport and hub entities and data intermediaries shall disclose output data in a clear and unambiguous manner, whenever possible, prior to the provision of a transport service or the conclusion of a transport contract. When transport and hub entities and data intermediaries disclose output data, in the communication accompanying that disclosure they shall include the statement ‘Greenhouse gas emissions calculated in accordance with Regulation (EU) 2026/1030’ in at least one of the official languages of the institutions of the Union, and where possible, also in an official language of the Member State on the territory of which the service is performed.