The Convention permits arrest and detention on remand only in the context of criminal proceedings for alleged past offences. Preventive detention is incompatible with the Convention. Moreover, during a certain period applicant had been detained on remand when there had been no valid domestic detention order or any other lawful basis for his remand in custody. Further, the authorities had not adduced relevant and sufficient reasons to justify the applicant's continued detention on remand for almost fifteen months. Finally, there had been a violation because the domestic courts had refused to examine the applicant's challenges to the lawfulness of his detention on remand.