Service life depends on duty cycle, environment, installation quality, maintenance and component type. Electrical boards may age differently from rollers, belts, contacts and other wear parts.
Some certificates have fixed validity or require surveillance, while others depend on unchanged standards and product designs. Always check the certificate terms and current status.
Examples can include locking devices, overspeed governors, safety gears, buffers, rupture valves and certain protective electronic systems, subject to the applicable regulation.
Responsibility follows the agreed Incoterm and contract. The importer commonly handles destination clearance, duties and local permits unless otherwise agreed.