IV ARREST, CUSTODY AND SURRENDER OF THE ACCUSED PERSON
Decision Taking on the Request of the International Criminal Court
Article 26
Where the criminal proceeding has already been instituted in the Republic of Serbia against the accused person relative to whom the surrender is requested by the International Criminal Court, and such request was transmitted to the Republic of Serbia after the beginning of said proceedings, the ruling on surrender may be passed only if the requirements provided for in Article 17 of the Statute are met.
EDIT.