§ 39 An application under paragraph 30, 31 or 36 may be made—
- (a) if it is for the variation or revocation of an order under Part 1, 2, 3 or 4 for periodical payments, by either civil partner, and
- (b) if it is for the variation of an order under paragraph 2(1)(c) or Part 2 or 3 for periodical payments to or in respect of a child, also by the child himself, if he has reached 16.