Ai+senses+of the+articles+807+e+808+code+proc.+Civ.+The+derogation+to+jurisdiction+ordinary+in+favor+of+jurisdiction+arbitral+must be+agreed+agreed+per+member.+Therefore,+if a+a+contract+is+concluded+per+behaviors+concludes nti,+on the+base+of+a+proposal+writing,+it+has+validity+and+efficacy+per+disciplinary+the+contract,+but+this is not enough+to assign+validity+ad+a+agreed+specific+for+the+which is+request+the+form+written+ad+substantiam.