Article 31. A person shall be presumed innocent until proved guilty according to the procedure established by law and declared guilty by an effective court judgment. A person charged with committing a crime shall have the right to a public and fair hearing of his case by an independent and impartial court. It shall be prohibited to compel anyone to give evidence against himself, or his family members or close relatives. Punishment may be imposed or applied only on the grounds established by law. No one may be punished twice for the same offence. A person suspected of committing a crime, as well as the accused, shall be guaranteed, from the moment of his apprehension or first interrogation, the right to defence, as well as the right to an advocate.