Investigating judges who are considering examining a person who has not already been heard as an assisted witness may request by letter rogatory, in accordance with the procedures set out in Article 151, any investigating judge to proceed with the examination of that person in accordance with the provisions of Article 116.
The examining magistrate responsible for executing the letter rogatory then proceeds to examine the person in accordance with the provisions of article 116, unless he considers, in the light of his observations or those of his lawyer, that there is no serious or corroborating evidence against him making his guilt likely, in which case this magistrate informs him that he has the rights of an assisted witness.
When a person has already been heard as an assisted witness, the examining magistrate may request any examining magistrate by rogatory commission to proceed with the examination of that person.