Article L2511-25 of the French General Code of Local Authorities
The borough council is chaired by the borough mayor. The arrondissement mayor is elected from within the arrondissement council. The offices of mayor of the municipality or of mayor of Paris and of arrondissement mayor are incompatible. The election of the arrondissement mayor following the general renewal of the municipal council or of the Paris council takes place eight days after that of the mayor of the municipality or of…