30/07/2019 The Constitution of the Republic of the Philippines | Official Gazette of the Republic of the Philippines face, and to have compulsory process to secure the attendance of witnesses and the production of evidence in his behalf. However, after arraignment, trial may proceed notwithstanding the absence of the accused provided that he has been duly noti ed and his failure to appear is unjusti able. SECTION 15. The privilege of the writ of habeas corpus shall not be suspended except in cases of invasion or rebellion when the public safety requires it. SECTION 16. All persons shall have the right to a speedy disposition of their cases before all judicial, quasi-judicial, or administrative bodies. SECTION 17. No person shall be compelled to be a witness against himself. SECTION 18. (1) No person shall be detained solely by reason of his political beliefs and aspirations. (2) No involuntary servitude in any form shall exist except as a punishment for a crime whereof the party shall have been duly convicted. SECTION 19. (1) Excessive nes shall not be imposed, nor cruel, degrading or inhuman punishment in icted. Neither shall death penalty be imposed, unless, for compelling reasons involving heinous crimes, the Congress hereafter provides for it. Any death penalty already imposed shall be reduced to reclusion perpetua. (2) The employment of physical, psychological, or degrading punishment against any prisoner or detainee or the use of substandard or inadequate penal facilities under subhuman conditions shall be dealt with by law. SECTION 20. No person shall be imprisoned for debt or non-payment of a poll tax. SECTION 21. No person shall be twice put in jeopardy of punishment for the same offense. If an act is punished by a law and an ordinance, conviction or acquittal under either shall constitute a bar to another prosecution for the same act. SECTION 22. No ex post facto law or bill of attainder shall be enacted. ARTICLE IV Citizenship SECTION 1. The following are citizens of the Philippines: (1) Those who are citizens of the Philippines at the time of the adoption of this Constitution; www.officialgazette.gov.ph/constitutions/1987-constitution/ 7/57