By closing it, the contract for the alienation of a good with the condition of life maintenance, produces certain effects, followed by the parts of the contract.In essence, the effects of the given contract represent the subjective rights and the civil obligations born from the agreement of the parties, these constituting the content of the legal report that appeared under this contract.In accordance with the principle of the pact are the servant, the valid contract concluded has the power of law between the contracting parties, the clauses provided by the parties of the contract must be respected exactly, and they are imposed, by the agreement of the parties, exactly as the law. Basically, this idea is expressed by the formula: "the contract is the law of the parties".The obligations of the contracting parties are to be executed, in the absence of special regulations, according to the general rules regarding the execution of the obligations.The maintenance debtor being obliged to grant maintenance in kind, under the conditions stipulated in the contract, and in the absence of special stipulations, according to the rules of the obligations to do.