Article L3215-1 of the French Public procurement code
The following defence or security concession contracts are subject to the rules defined in Title II : 1° Contracts presenting the characteristics mentioned in articles L. 3212-4, L. 3213-1 and L. 3213-2 ; 2° For which, where the protection of the essential security interests of the State cannot be guaranteed by other measures : a) Application of this Part would require disclosure of information contrary to the essential security interests…