Joint projects are often involove contractual and financing-complex transactions. Therefore, the contract might consist of a set of contracts, commitments, guarantees and appendices governing the contractual relationship between the Federal Entity, the project company and any other stakeholder such as the guarantor or financing banks, Federal Entities or local governments on which the project implementation may cause some consequences or tasks and duties. Therefore, the signatories of the PPP contract may be numerous and may vary from a partnership contract to another. In some cases, it may be required to sign a series of contracts and additional memorandum of understandings necessary for the success of the project.