An accused person must be apprised from the outset what charge he or she has to meet and its consequences, as such knowledge dictates decisions that affect the right to a fair trial, including whether to conduct one's own defence, apply for legal aid, testify, and what witnesses to call. Where the trial court amends a charge sheet after the accused has pleaded and all evidence has been led, thereby exposing the accused to a higher prescribed minimum sentence (from s 51(2) to s 51(1) of the Criminal Law Amendment Act 105 of 1997), without affording the accused any opportunity to address the court on the question of prejudice and whether the amendment should be effected, this constitutes a fundamental irregularity that infringes fair trial rights and destroys the validity of the amendment. In such circumstances, it is not possible to say with certainty that the accused suffered no prejudice, as they may have conducted their defence differently had they known the true nature of the charge from the outset.