12 Minister of Minerals and Energy v. Agri South Africa, supra, note 9, at [39], [49] and [83]. See, for instance, Law 7 of 1883 (ZAR) requiring notarial execution and registration of alienation of mineral rights. 13 Minister of Minerals and Energy v. Agri South Africa, supra, note 9, at [52] [63]. See, for