Article R531-30 of the French Code governing the entry and residence of foreign nationals and the right of asylum
When the French Office for the Protection of Refugees and Stateless Persons takes a decision of inadmissibility in the case provided for in 1° or 2° of Article L. 531-32, it shall rule within one month of the submission of the application or, if the grounds for inadmissibility are revealed during the interview, within one month of this interview.