PART III. – BASIC PRINCIPLES OF GOVERNMENT.
Division 3. – Basic Rights.
Subdivision B. – Fundamental Rights.
37. PROTECTION OF THE LAW.
(8) No person who shows that he has been tried by a competent court for an offence and has been convicted or acquitted shall again be tried for that offence or for any other offence of which he could have been convicted at the trial for that offence, except upon the order of a superior court made in the course of appeal or review proceedings relating to the conviction or acquittal.
(9) No person shall be tried for an offence for which he has been pardoned.
EDIT.