All contracts, agreements or conventions entered into by public administrations and providing for the exemption of taxes, duties or levies collected by the State on its own behalf or on behalf of public authorities shall be null and void with regard to these exemptions, when they have not received the prior approval of the Minister of the Economy and Finance or his representatives and insofar as they have not been ratified by Parliament.
The provisions of articles L. 131-1 to L. 131-20 of the Code des juridictions financières will eventually be applicable in this case.