If in a contract tender stipulated A followed of tender tender per lactation private launched from administration public, the parts have express express recall, which part i i Norgorante of the contract, at rules of the specifications general per le works public, between the which are those those related to competence referee per the definition of the disputes, Not VI is need a a separate clause bossial, place that the will of the contractors find already its expression in the call pact, so the source of the competence arbitration v A identified not in the law, but in a convention compromise. not it is however sufficient a recall merely formal at the specifications which provides possibly the clause compromise.