Where representation by a lawyer is mandatory, in addition to the information prescribed in articles 54 and 56, the summons shall contain on pain of nullity:
1° The constitution of the plaintiff’s lawyer;
2° The time limit within which the defendant is required to constitute a lawyer.
Where applicable, the summons shall mention the plaintiff’s agreement for the proceedings to proceed without a hearing pursuant to the article L. 212-5-1 du code de l’organisation judiciaire.