Extradition and European Arrest Warrant Act
Chapter four - EFFECT OF GRANTED EXTRADITION
Title I - Obligations of the Republic of Bulgaria in the capacity of requested state
Article 27
In cases under Art. 18, para 1 surrender shall be effected after termination of criminal proceedings against the person, following completion of proceedings by acquittal or once the person has served his/her punishment to deprivation of liberty.
Postponement of execution of ICC request
Postponement - ongoing investigation or prosecution
EDIT.