Article R2334-27 of the French General Code of Local Authorities
The rate of subsidy may not be less than 20% of the provisional amount of subsidisable expenditure excluding tax. When they contribute to the financing of investment projects, the dotation d’équipement des territoires ruraux, the dotation politique de la ville, the dotation de soutien à l’investissement local and the dotation de soutien à l’investissement des départements may not represent, used alone or in combination, more than 80% of the provisional…