§1. The question of an objection must be decided as promptly as possible (expeditissime) after the parties have been heard as well as the promoter of justice or defender of the bond, if they take part in the trial and are not the ones against whom the objection has been lodged.
§2. Acts placed by a judge before an objection is lodged are valid; nevertheless, those acts placed after the objection has been lodged must be rescinded if a party requests it within ten days from the acceptance of the objection.
Source: Code of Canon Law (Vatican.va)