1When a deaf, mute or deaf-mute person wishes or are required to give explanations, it is acted in this way:
aquestions and warning are given to the deaf person in writing and he answers orally.
bquestions and warnings are given to the mute person orally and he answers in writing.
cquestions and warning are given to the deaf-mute person in writing and he answers in writing.
2If the deaf, mute or deaf-mute person does not know how to read or write, the proceeding authority shall assign one or more interpreters selected amongst persons who are used to communicate with them.