§ 1. Besides those who are enumerated in cann. 1355-1356, all who can dispense from a law which is supported by a penalty, or excuse from a precept which threatens a penalty, can also remit the penalty itself. § 2. Moreover, a law or precept which establishes a penalty can also grant to others the power of remitting the penalty. § 3. If the Apostolic See has reserved the remission of a penalty to itself or to others, the reservation is to be strictly interpreted.
Source: Code of Canon Law (Vatican.va)