Article LO6314-5 of the French General Code of Local Authorities
Under the conditions laid down in Article LO 6351-3, the local authority may participate, under the supervision of the State, in the exercise of the powers that fall to the State in matters of criminal law with a view to punishing infringements of the rules that it lays down in the matters referred to in I of Article LO 6314-3 and in matters of maritime policing and safety.