In cases for which the parties are exempted from the assistance of a lawyer at the Conseil d’Etat and the Cour de cassation, decisions of cassation are notified by the registry of the Cour de cassation by registered letter with acknowledgement of receipt; decisions of dismissal or of cassation without referral are brought by simple letter to the attention of the parties who are not assisted or represented by a lawyer at the Conseil d’Etat or the Cour de cassation.