Can. 1512 When the citation has been communicated legitimately or the parties have appeared before the judge to pursue the case: 1° the matter ceases to be res integra; 2° the case becomes proper to the otherwise competent judge or tribunal before which the action was initiated; 3° the jurisdiction of a delegated judge is fixed in such a way that it does not cease when the authority of the one delegating expires; 4° prescription is interrupted unless other provision is made; 5° the litigation begins to be pending; therefore, the principle while litigation is pending, nothing is to be altered immediately takes effect.