Part One
GENERAL PART
Chapter VI
THE DEFENDANT AND DEFENCE COUNSEL
1 The Defendant
Rights of Persons Arrested
Article 69
A person arrested without a court decision, or a person who has been arrested on the basis of a court decision but not interrogated, must without delay, and within 48 hours at most, be handed over to the competent judge for the preliminary proceedings, or, if this is not done, must be released from custody.
Rights during investigation - arbitrary arrest or detention and deprivation of liberty
EDIT.