Article L2511-28 of the French General Code of Local Authorities
The arrondissement may delegate under the conditions provided for in the first paragraph of article L. 2122-18 et l’article L. 2122-20. In the cases provided for in Article L. 2122-17, the borough mayor is replaced by one of his or her deputies who is a member of the city council or Paris council or, failing that, by another deputy or, failing that, by any other member of the borough council…