299. Saving the case described in article 301, no one may testify, under penalty of the nullity of his deposition, unless he has taken the oath or made the solemn affirmation that he will tell the truth, the whole truth and nothing but the truth.
A witness may take the oath according to the formalities prescribed by his religious belief, unless the judge sees some practical objection to his doing so, in which case the witness makes a solemn affirmation.
In all cases the judge must see that the form of the oath or solemn affirmation is read to the witness in such a way as to be well understood by him.
1965 (1st sess.), c. 80, a. 299; 1986, c. 95, s. 64.