6.—(1) In these Regulations, paragraphs (2) to (4) apply in order to determine the persons who are family members of another person.
(2) If the other person is a student, the persons are—
(a)his spouse; and
(b)his dependent children.
(3) If he is a self-sufficient or retired person, the persons are—
(a)his spouse;
(b)descendants of his or of his spouse who are under 21 or are their dependants; and
(c)dependent relatives in his ascending line or that of his spouse.
(4) In any other case, the persons are—
(a)his spouse;
(b)descendants of his or of his spouse who are under 21 or are their dependants;
(c)dependent relatives in his ascending line or that of his spouse.