Article R2152-3 of the French Public procurement code
The purchaser shall require the tenderer to justify the price or costs proposed in his tender if it appears to be abnormally low in relation to the works, supplies or services, including for the part of the contract that he intends to subcontract.Justifications relating in particular to the following aspects may be taken into consideration:1° The method of manufacture of the products, the arrangements for the provision of the services,…