The state procurement law provides for the obligation to conduct a study of risks to avoid paralysis and claims during contract performance. However, it did not address the issue from the perspective of methodological rules for distribution, leaving all expectations in the hands of the parties, necessitating its establishment, because the absence of these can affect the economy of the contract. Methodological rules for the distribution of risks in the works concession contracts and transportation infrastructure are limited to: preserve the commutativity of the contract, to the assumption by the state, abnormal risk, to negotiate a balanced risk; to establish new agreements through the renegotiation of the contract, to compensate arithmetically compensate for the risks assumed and additionally when the risks exceed the estimated consequences transferable. By virtue of these rules will be avoided where possible to provide for financial liability for a party to the contractual relationship. For purposes of the above provisions has been advanced legal research, qualitative and descriptive in nature.