Article 2320

The architect or the engineer may be relieved from liability only by proving that the defects in the work or in the part of it completed do not result from any erroneous or faulty expert opinion or plan he may have submitted or from any failure to direct or supervise the work.

The contractor may be relieved from liability only by proving that the defects result from an erroneous or faulty expert opinion or plan of the architect or engineer selected by the client. The subcontractor may be relieved of liability only by proving that the defects result from decisions made by the contractor or from the expert opinions or plans furnished by the architect or engineer.

They may, in addition, be relieved from liability by proving that the defects result from decisions imposed by the client in selecting the land or materials, or the subcontractors, experts, or construction methods.