Article R3121-6 of the French Public procurement code
Concession contracts may be concluded without prior advertising or competitive tendering in the following cases: 1° The concession contract may only be awarded to a specific economic operator for technical or artistic reasons or for reasons relating to the protection of exclusive rights; 2° Where no applications or tenders have been received or where only inadmissible applications within the meaning of Article L. 3123-20 or unsuitable tenders within the meaning…