customs authoritiesmeans the customs authorities as defined in point (1) of Article 5 of Regulation (EU) No 952/2013;
customs control equipmentmeans equipment intended primarily for performing customs controls;
customs controlsmeans the customs controls as defined in point (3) of Article 5 of Regulation (EU) No 952/2013;
maintenancemeans preventive, corrective and predictive interventions, including operational and functional checks, servicing, repair and overhaul of a piece of customs control equipment necessary in order for it to retain, or to be restored to, its specified operable condition with a view to it achieving its maximum useful life, but excluding any upgrading;
mobile customs control equipmentmeans any means of transport that, beyond its mobile capacities, is itself intended to be a piece of customs control equipment or that is fully equipped with customs control equipment;
upgrademeans evolutive interventions necessary for bringing an existing piece of customs control equipment from an outdated to a state-of-the-art specified operable condition.