What is the significance of Article 20 of the Indian Constitution?
The significance of Article 20 of the Indian Constitution is that it provides protection to individuals against certain kinds of legal proceedings. It states that:

1. No person shall be convicted for an offence except for a violation of a law in force at the time of the commission of the act charged as an offence, and no one can be subjected to a penalty greater than what was available under the law in force at the time of the offence's commission (Protection against ex post facto laws).
2. No person shall be prosecuted and punished for the same offence more than once (Protection against double jeopardy).
3. No person accused of an offence can be forced to testify against himself (Protection against self-incrimination).