Here are the key points in response to your questions: - Ho Kwan Seng established that the rule of natural justice requiring a person not be condemned unheard applies to every administrative action that adversely affects an individual, regardless of how the power is labeled. This extended natural justice protections beyond just "judicial" or "quasi-judicial" powers. - Rohana Ariffin was significant as it was the first case to explicitly illustrate the application of procedural fairness in Malaysia. It established that procedural fairness requires the duty to give reasons for decisions that adversely impact individuals. It extended the obligations of decision-makers under natural justice/procedural fairness beyond just the right to be heard. In summary, Ho