French to English Law/Patents Law (general) summons to appear

Hello again,
This is another extract from a summons to appear at a repossession hearing. To my understanding the conclusions d'avocat are the documents in which the lawyer sets out the case for his client, would that be right? I have found pleadings, findings and submissions but I'm not sure what is correct here. Thanks for any help!
A PEINE D’IRRECEVABILITE, TOUTE CONTESTATION OU DEMANDE INCIDENTE DOIT ETRE DEPOSEE AU GREFFE DU JUGE DE L’EXECUTION PAR CONCLUSIONS D’AVOCAT CONSTITUE PAR DEVANT LE JUGE DE L’EXECUTION DELEGUE PAR LE PRESIDENT DU TRIBUNAL DE GRANDE INSTANCE DE NANTERRE, AU PLUS TARD LORS DE L’AUDIENCE