Subcontracting With regard to the contractors working at our sites, we defined a procedure for any subcontractors used to carry out activities, envisaging specific authorisation, with preventive checks on the technical-professional suitability of the subcontractor, the regular payment of wages and contributions, respect of the workplace safety regulations, the extent in percentage terms of the subcontract compared to the total works, and a guarantee of the maximum discount applied with respect to contract prices.