§1. A person who claims to have been aggrieved by a decree can make recourse for any just reason to the hierarchical superior of the one who issued the decree. The recourse can be proposed before the author of the decree who must transmit it immediately to the competent hierarchical superior.
§2. Recourse must be proposed within the peremptory time limit of fifteen useful days which in the cases mentioned in can. 1734, §3 run from the day on which the decree was communicated; in other cases, however, they run according to the norm of can. 1735.
§3. Nevertheless, even in cases in which recourse does not suspend the execution of the decree by the law itself and suspension has not been decreed according to the norm of can. 1736, §2, the superior can order the execution to be suspended for a grave cause, yet cautiously so that the salvation of souls suffers no harm.
Source: Code of Canon Law (Vatican.va)