Canon 1678. §1 In cases of the nullity of marriage, a judicial confession and the declarations of the parties, possibly supported by witnesses to the credibility of the parties, can have the force of full proof, to be evaluated by the judge after he has considered all the indications and supporting factors, unless other elements are present which weaken them.

§2 In the same cases, the testimony of one witness can produce full proof if it concerns a qualified witness making a deposition concerning matters done ex officio, or unless the circumstances of things and persons suggest it.

§3 In cases of impotence or defect of consent because of mental illness or an anomaly of a psychic nature, the judge is to use the services of one or more experts unless it is clear from the circumstances that it would be useless to do so; in other cases the prescript of can. 1574 is to be observed.

§4 Whenever, during the instruction of a case, a very probable doubt arises as to whether the marriage was ever consummated, the tribunal, having heard both parties, can suspend the case of nullity, complete the instruction for a dispensation super rato, and then transmit the acts to the Apostolic See together with a petition for a dispensation from either one or both of the spouses and the votum of the tribunal and the bishop.

§1. In causis de matrimonii nullitate, confessio iudicialis et partium declarationes, testibus forte de ipsarum partium credibilitate sustentae, vim plenae probationis habere possunt, a iudice aestimandam perpensis omnibus indiciis et adminiculis, nisi alia accedant elementa quae eas infirment.

§2. In iisdem causis, depositio unius testis plenam fidem facere potest, si agatur de teste qualificato qui deponat de rebus ex officio gestis, aut rerum et personarum adiuncta id suadeant.

§3. In causis de impotentia vel de consensus defectu propter mentis morbum vel anomaliam naturae psychicae iudex unius periti vel plurium opera utatur, nisi ex adiunctis inutilis evidenter appareat; in ceteris causis servetur praescriptum can. 1574.

§4. Quoties in instructione causae dubium valde probabile emerserit de non secuta matrimonii consummatione, tribunal potest, auditis partibus, causam nullitatis suspendere, instructionem complere pro dispensatione super rato, ac tandem acta transmittere ad Sedem Apostolicam una cum petitione dispensationis ab alterutro vel utroque coniuge et cum voto tribunalis et Episcopi.

Canon 1679. The sentence that first declared the nullity of the marriage, once the terms as determined by can. 1630-1633 have passed, becomes executive.

Sententia, quae matrimonii nullitatem primum declaravit, elapsis terminis a can. 1630-1633 ordinatis, fit exsecutiva.

Canon 1680. §1 The party who considers himself or herself aggrieved, as well as the promoter of justice and the defender of the bond, have the right to introduce a complaint of nullity of the judgment or appeal against the sentence, according to can. 1619-1640.

§2 After the time limits established by law for the appeal and its prosecution have passed, and after the judicial acts have been received by the tribunal of higher instance, a college of judges is established, the defender of the bond is designated, and the parties are admonished to put forth their observations within the prescribed time limit; after this time period has passed, if the appeal clearly appears merely dilatory, the collegiate tribunal confirms the sentence of the prior instance by decree.

§3 If an appeal is admitted, the tribunal must proceed in the same manner as the first instance with the appropriate adjustments.

§4 If a new ground of nullity of the marriage is alleged at the appellate level, the tribunal can admit it and judge it as if in first instance.

§1. Integrum manet parti, quae se gravatam putet, itemque promotori iustitiae et defensori vinculi querelam nullitatis sententiae vel appellationem contra eandem sententiam interponere ad mentem can. 1619-1640.

§2. Terminis iure statutis ad appellationem eiusque prosecutionem elapsis atque actis iudicialibus a tribunali superioris instantiae receptis, constituatur collegium iudicum, designetur vinculi defensor et partes moneantur ut animadversiones, intra terminum praestitutum, proponant; quo termino transacto, si appellatio mere dilatoria evidenter appareat, tribunal collegiale, suo decreto, sententiam prioris instantiae confirmet.

§3. Si appellatio admissa est, eodem modo quo in prima instantia, congrua congruis referendo, procedendum est.

§4. Si in gradu appellationis novum nullitatis matrimonii caput afferatur, tribunal potest, tamquam in prima instantia, illud admittere et de eo iudicare.