by fitters or workshops approved by the competent authorities under Article 24 for repair, maintenance or recalibration purposes of the tachograph, or by control officers properly trained and, where required authorised, for control purposes;
go ndéanfaidh feisteoirí nó ceardlanna a bheidh ceadaithe ag na húdaráis faoi Airteagal 24 é chun críche deisithe, cothabhála nó athchalabraithe an tacagraif nó go ndéanfaidh oifigigh rialaithe a bheidh oilte mar is cuí é agus, i gcás ina n-údaraítear é, chun críche rialaithe,