Article R2393-24 of the French Public procurement code
The holder of the contract may subcontract when the contract is awarded and throughout its performance, provided that he has declared this to the purchaser and has obtained the subcontractor’s acceptance. The purchaser shall state in the contract notice or, in the absence of such a notice, in another consultation document that each subcontractor must be submitted for acceptance. It shall also specify the conditions for rejecting subcontractors in accordance…