Part One. General Provisions
Section II. Participants in the Criminal Court Proceedings
Chapter 7. Participants in the Criminal Court Proceedings on the Side of the
Defence
Article 47. The Accused
4. 14) to lodge complaints against the actions (the lack of action) and decisions of the inquirer, of the investigator, of the prosecutor or of the court, and to take part in their examination by the court ;
Appeal against other decisions - national proceedings
Appeal relating to a decision involving an issue that would significantly affect the fair and expeditious conduct of the proceedings or the outcome of the trial - national proceedings
EDIT.