A/HRC/19/57 it emphasizes that such measures are not compulsory but rather constitute a last resort mechanism to restrict one’s liberty pending trial. 81. The Working Group recommends that States provide for and ensure the right to a habeas corpus in their domestic legislation. The Working Group further recommends that non-governmental organizations, national institutions and United Nations agencies and offices should include relevant information on the action of habeas corpus in their contributions to the universal periodic review mechanism. 82. The Working Group recommends that States remedy arbitrary detention mainly by immediate release and compensation as required by international human rights conventions and customary international law, and assist the Working Group in the follow-up of its Opinions in individual cases. 25