LAW ON PROTECTION OF WITNESSES UNDER THREAT AND VULNERABLE WITNESSES
CHAPTER III - OTHER PROVISIONS
Article 24 - Confidentiality
(1) Information that a person who performs official duties in connection with witness protection measures acquires in the course of those duties relating to witness protection measures, constitutes an official secret.
(2) The Court or the Prosecutor shall warn persons who are present at hearings, or who are otherwise given possession of such secret information in the exercise of their official or professional duties, that the unauthorised disclosure of such information is a criminal offence.
(3) A person who performs official duties in connection with witness protection measures and who acquires information referred to in paragraph 1 of this Article cannot be required in any proceeding in any court, tribunal, or commission of inquiry, however described, to produce any document or divulge or communicate any matter relating to that information.
Confidentiality re documents and information
Procedure for witness testimony - national proceedings
EDIT.