BOOK SECOND
LAWS OF CRIMINAL PROCEDURE
PART I
OF THE AUTHORITIES TO WHICH THE ADMINISTRATION OF CRIMINAL JUSTICE IS ENTRUSTED
Title I Of the Powers and Duties of the Executive Police in respect of Criminal Prosecutions
Sub-title VIII
DETENTION
355AL. (1) It shall be duty of the custody officer to order the immediate release from custody of any person in police detention in the circumstances mentioned in article 355AJ(3) or where the custody officer becomes aware that the grounds for the detention of that person have ceased to apply and there are no other lawful grounds on which the continued detention of that person could be justified.
Fair trial standards
Rights during investigation - arbitrary arrest or detention and deprivation of liberty
EDIT.