1. Legislative provisions that have a disproportionate impact on people of a particular race constitute indirect discrimination on the ground of race under section 9(3) of the Constitution, even if the provisions do not expressly refer to race. 2. Indirect discrimination on a listed ground under section 9(3) gives rise to a presumption of unfairness which must be rebutted. 3. Discrimination is unfair where it treats similarly situated persons differently without justification, particularly where it adversely affects vulnerable groups such as poor workers who rely on public transport. 4. When a court declares legislation constitutionally invalid, section 172(1)(b) requires it to make a just and equitable order, which may include suspending the declaration of invalidity to allow Parliament to cure the defect. 5. In determining a just and equitable remedy, courts must balance effective vindication of infringed rights against the interests of good government, including avoiding unsupportable budgetary intrusion. 6. Budget matters fall eminently within the domain of the legislature and executive, and courts are ordinarily ill-suited to determine such matters. 7. Where unlimited retrospective invalidity would have serious budgetary implications threatening the sustainability of a social security fund, it is appropriate to suspend the invalidity and give Parliament opportunity to provide a remedy. 8. If Parliament fails to cure a constitutional defect within the time allowed, the invalidity will operate with full retrospective effect (except for finalized matters).