Astra took a life insurance from an insurance company, Zeneka Osem Insurance (ZOI). In the insurance proposal form, Astra filled in that he had never suffered from any serious illness or been treated in hospital. In fact, he had received kidney treatment at a hospital due to diabetes, which he had been suffering from for the past five years. After receiving the insurance policy from ZOI, Astra was admitted to the hospital again for kidney treatment. He made an insurance claim on the cost of his treatment. However, when ZOI made an investigation, it found that Astra did not disclose the actual fact in his insurance proposal form. Therefore, ZOI rejected the claim made by Astra. Astra, who is dissatisfied with ZOI's decision, seeks your advice on the matter. Advise Astra based on one (1) principle of law, one (1) statutory provision and one (1) case authority relating to the law of insurance