Abstract
Until 1 July 2015, the Penal Code provided for the possibility of aggregating penalties that had been carried out. A change in this respect was brought about by the2015 amendment, which changed the rules for aggregating penalties and eliminated the possibility of applying an aggregated penalty to a penalty already served. However, on 24 June 2020, the previous solution was restored by introducing Art. 91a to the Penal Code. This, in turn, makes it necessary to present this issue in more detail due to the doubts as to the scope of application of this provision.