Civil Code, Art. 1407

In a contract where both parties are incapable of giving consent, express or implied ratification by the parent, or guardian, as the case may be, of one of the contracting parties shall give the contract the same effect as if only one of them were incapacitated. If ratification is made by the parents or guardians, as the case may be, of both contracting parties, the contract shall be validated from the inception.