Candidates must have a perfect knowledge of the target language (usually their mother tongue) and a thorough knowledge of at least two other official languages.
Caithdh eolas foirfe a bheith ag iarrthóirí ar an sprioctheanga (a máthairtheanga de ghnáth) agus eolas an-mhaith a bheith acu ar dhá theanga oigiúla eile ar a laghad.