Protection in respect of conviction for offences
No person shall be convicted of any offence except for violation of the law in force at the time of the commission of the act charged as an offence, nor be subjected to a penalty greater than that which might have been inflicted under the law in force at the time of the commission of the offence
No person shall be prosecuted and punished for the same offence more than once
No person accused of any offence shall be compelled to be a witness against himself