The binding legal principles established are: (1) Mootness is not an absolute bar to the justiciability of an issue, and the Constitutional Court may entertain a moot appeal where the interests of justice so require, but the Court has discretion not to hear moot matters where the relevant factors (practical effect, importance of issues, complexity, resolution of conflicting precedents) are not present. (2) Where a lower court has not decided a matter on the merits but only on preliminary grounds such as ripeness or lack of prejudice, and where any order by the Constitutional Court would have no practical effect because the subject matter of the dispute has been withdrawn or abandoned, it is not in the interests of justice to grant leave to appeal. (3) A punitive costs order on an attorney and client scale is warranted where a party conducts itself in a reprehensible manner, including pursuing litigation known to be moot as a pressure tactic to obtain costs orders, lacking candour with the court about material developments, and abusing court processes.