Part Two. Pre-Trial Proceedings
Section VIII. Preliminary Inquisition
Chapter 26. Interrogation. Identification Line-Up. Identification. Verification of the Evidence
Article 193. Presenting for an Identification
8. For the purpose of ensuring the security of the identifying person, the presentation of the person for an identification may be carried out, at the investigator's decision, under the conditions, precluding the visual observation of the identifying person by the identified one. In this case, the attesting witnesses shall also be placed at the side of the identifying person.
National judicial procedures protecting witnesses from identification – witness protection
EDIT.