The binding legal principles established are: (1) Sections 68(6)(b) and 89(1) of the National Road Traffic Act do not preclude a spoliation order where police have unlawfully seized a vehicle with tampered identification numbers. (2) Statutes must, as far as possible, be read in conformity with the common law, including the mandament van spolie, unless plainly intended to alter it. (3) The phrase "without lawful cause" in section 68(6)(b) means possession of a tampered vehicle can be lawful in certain circumstances, distinguishing it from articles that are unlawful to possess under all circumstances. (4) Whether a person has "lawful cause" to possess a vehicle requires a factual enquiry that cannot be undertaken in spoliation proceedings, where the merits of possession are irrelevant. (5) The mandament van spolie applies against police and state entities where they have seized goods unlawfully, regardless of whether they purported to act under color of law. (6) The spoliation order serves to vindicate the rule of law and prevent self-help, and must be restored before all else (spoliatus ante omnia restituendus est). (7) Reading statutes to oust the mandament van spolie would encourage a culture of impunity amongst police, which is inconsistent with constitutionalism and the rule of law.