"1.5 Odklopna naprava pomeni vsak del, ki meri, zaznava ali se odziva na operativne spremenljivke (npr. hitrost vozila, vrtilno frekvenco motorja, uporabljeno prestavo, temperaturo, tlak v polnilnem zbiralniku ali kateri koli drug parameter) zaradi aktiviranja, prilagajanja, zakasnitve ali deaktiviranja delovanja katerega koli dela sistema ali funkcije sistema za uravnavanje emisij, ki zmanjšuje učinkovitost sistema za uravnavanje emisij pod pogoji, pričakovanimi pri normalni uporabi vozila, razen če je uporaba takšne naprave pretežno vključena v veljavni preskusni postopek za homologacijo emisij.
"Defeat device" means a device which measures, senses or responds to operating variables (e.g. vehicle speed, engine speed, gear used, temperature, intake pressure or any other parameter) for the purpose of activating, modulating, delaying or deactivating the operation of any component or function of the emission control system such that the effectiveness of the emission control system is reduced under conditions encountered during normal vehicle use unless the use of such a device is substantially included in the applied emission certification test procedure.