(13)The exemption set out in Article 17(2) of Regulation (EU) No 596/2014 excludes from the definition of emissions allowance market participant those participants in the emission allowance market where the installations or aviation activities they own, control or are responsible for, have had in the preceding year emissions not exceeding a minimum threshold of carbon dioxide equivalent and, where they carry out combustion activities, have had a rated thermal input not exceeding a minimum threshold. Hence, the minimum thresholds should relate to all business, including aviation activities or installations, which the participant in the emission allowance market concerned, or its parent undertaking or related undertaking owns or controls or for the operational matters of which the participant concerned, or its parent undertaking or related undertaking is responsible, in whole or in part.