- Article 20(1): Protection against ex-post facto law (No conviction for acts that were not offences at the time they were committed, or higher penalties than applicable at that time). - Article 20(2): Protection against double jeopardy (No person shall be prosecuted and punished for the same offence more than once). - Article 20(3): Protection against self- incrimination (No person accused of any offence shall be compelled to be a witness against himself).