CHAPTER FOUR –– THE BILL OF RIGHTS
Part 2—Rights and fundamental freedoms
50. Fair hearing.
(6) A person who is convicted of a criminal offence may petition the High Court for a new trial if––
(a) the person’s appeal, if any, has been dismissed by the highest court to which the person is entitled to appeal, or the person did not appeal within the time allowed for appeal ; and
(b) new and compelling evidence has become available.
Appeal against decision of acquittal or conviction or against sentence - national proceedings
EDIT.