Section 276B(2) of the Criminal Procedure Act 51 of 1977 does not oblige a sentencing court to fix a non-parole period in respect of the effective period of imprisonment as a matter of routine whenever sentences are ordered to run concurrently. Properly construed, section 276B(2) only becomes operative once the court has first exercised its discretion under section 276B(1)(a) to impose a non-parole period; subsection (2) then requires the court to fix that non-parole period in respect of the effective period of imprisonment, taking into account the limitations in section 276B(1)(b). A non-parole period should only be imposed in exceptional circumstances when there are facts before the sentencing court that would continue after sentence to result in a negative outcome for any future decision about parole, such as undisputed evidence that the accused has very little chance of being rehabilitated. Parties are entitled to address the sentencing court on two questions: first, whether to impose a non-parole period, and second, what period to attach to such an order. Failure to afford the parties the opportunity to address these issues constitutes a misdirection and may, depending on the facts, infringe the accused's constitutional fair trial rights under section 35(3) of the Constitution.