BULGARIA - PENAL PROCEDURE CODE
Part two. EVIDENCING
Chapter thirty six. PROCEDURES IN CONNECTION WITH INTERNATIONAL COOPERATION ON PENAL CASES
Section III. International Legal Assistance in Penal Cases
Art. 474 (2) The request for interrogation from the court authority of the other state shall contain:
1. the reason for which the appearance of the person himself/herself is undesirable or impossible;
2. the name of the court authority of the other state;
3. the data of the persons who will carry out the interrogation;
4. the consent of the person who will be interrogated as a witness or an expert through a telephone conference;
5. the consent of the defendant who will participate in a hearing for interrogation through a video conference.
Contents of request - other forms of assistance
Statement of purpose of request and assistance sought
Any other information relevant for the assistance sought
Contents of request - national law requirements
EDIT.