Article R2194-7 of the French Public procurement code
The contract may be amended without a new competitive tendering procedure if the amendments, whatever their amount, are not substantial. For the purposes of article L. 2194-1, a modification is substantial, in particular, when at least one of the following conditions is met: 1° It introduces conditions which, if they had been included in the initial award procedure, would have attracted more economic operators or enabled other economic operators to…