The binding legal principles established are: (1) When considering whether a high court ought to have granted leave to appeal on petition, the issue is not the merits of the appeal itself, but whether the appellant has reasonable prospects of success - requiring a sound, rational basis showing a realistic chance of success, not merely arguability or possibility. (2) In applying minimum sentencing provisions under section 51(2) of the Criminal Law Amendment Act, general mitigating factors such as a guilty plea, first offender status, offers of restitution, and claimed remorse do not automatically constitute substantial and compelling circumstances justifying deviation from prescribed minimum sentences. (3) A trial court does not misdirect itself in refusing to find substantial and compelling circumstances where the factors advanced are of a general nature commonly present in many cases, particularly where remorse is questionable (shown only after detection rather than at the time of wrongdoing). (4) The principles in S v Malgas apply: when applying section 51, a trial court is not in appellate mode but faces a statutory injunction to impose particular sentences unless satisfied that substantial and compelling circumstances exist which justify a different sentence.