BULGARIA - PENAL PROCEDURE CODE
Part two. EVIDENCING
Chapter thirteen. PROOFS
Section II. Voice Proofs
Art. 115. (1) The accused shall render his/ her explanations orally and directly before the respective body.
Reasons shall be rendered in the presence of a counsel, where the accused so requests. The request shall be entered in the record and the counsel shall be summoned for the interrogation.
(2) The accused shall not be interrogated on commission or by video-conference, except in the cases, where he/she is abroad and where this will not impede the revealing of the objective truth.
(3) The accused shall be entitled to give explanations at any time of the investigation and of the court investigation.
(4) The accused shall be entitled to refuse to give reasons.
Fair trial standards
Rights during trial - remain silent
Rights during trial - unsworn oral or written statement in defence
EDIT.