Can. 1688

. After receiving a petition proposed according to the norm of can. 1677, the diocesan bishop or the judicial vicar or a judge designated by him can declare the nullity of a marriage by sentence if a document subject to no contradiction or exception clearly establishes the existence of a diriment impediment or a defect of legitimate form, provided that it is equally certain that no dispensation was given, or establishes the lack of a valid mandate of a proxy. In these cases, the formalities of the ordinary process are omitted except for the citation of the parties and the intervention of the defender of the bond.