 The mandates, decrees or ordinances are issued either by the bishop himself or by one of his officials.The synodal statutes are ordinances issued by the bishop at the diocesan synod, with the advice, but in no way with the legislative co-operation, of the diocesan clergy.The diocesan statutes, regularly speaking, are those episcopal ordinances which, because they refer to more weighty matters, are prepared with the obligatory or facultative co-operation of the cathedral chapter.