In addition, Article 2(3) provided that `if the legal and actual conditions for the continuation of the construction programme for which a concession has been granted are fulfilled, an addendum shall be concluded in order to create a contractual framework for the construction and operation of two other sections: Cecina-Grosseto and Grosseto-Civitavecchia`. – Successful PPPs must be designed in such a way as to offer private partners the potential to obtain a return commensurate with those of them, the risks. Since risks are shared with public partners, returns should also be shared. Tendering procedures must be competitive and require an appropriate regulatory and financial framework at national level. Public bodies should have flexibility in the types of agreements they can conclude and retain the possibility of awarding contracts according to the quality/price ratio provided for by the best mix between private and public risk allocation. find that the renewal, from 2028 to 2046, of the public works concession for the construction and management of the A12 motorway, introduced in 2009, constituted an amendment to an essential aspect of the 1999 contract between the contracting authority (Azienda Nazionale Autonoma delle Strade) and the concessionaire (Società Autostrada Tirrenica); and that the Italian Republic thus opposes its obligations under Art. 2 and 58 of Directive 2004/18/EC of the European Parliament and of the Council of 31 March 2004 coordinating procedures for the award of public works contracts, public supply contracts and public service contracts, as amended, that it has not made that amendment subject to a procurement procedure; In the European Union, PPPs have developed in the transport sector (road, rail), in the field of public buildings and facilities (schools, hospitals, prisons) and the environment (water treatment/waste, waste management). .