The son is entitled to his share if he is less than 21 years of age at the time of his parent's death. His share will be discontinued when he reaches the age of 21, except in the following cases: -- If he is a student and unemployed he will receive his share until he is 28 years old or becomes employed, whichever comes first. -- If he is disabled and unable to make a living, he will receive his share till his health is restored or the Medical Committee of the Authority decides that it is impossible for him to recover.