Under the subjective test applied in Karam Singh and Lee Mau Seng, the exercise of discretion by the President and the Minister under sections 8 and 10 of the ISA is not open to review. The court cannot enquire about the grounds and the facts justifying the executive's decision. In contrast, under the objective test, the exercise of discretion is reviewable by a court of law and the executive has to satisfy the court that there are objective facts justifying the executive's decision.
