(1) A court must not make a child maintenance order in relation to a child who is 18 or over unless the court is satisfied that the provision of the maintenance is necessary:
(a) to enable the child to complete his or her education; or
(b) because of a disability of the child.
The court may make such a child maintenance order, in relation to a child who is 17, to take effect when or after the child turns 18.
(2) A court must not make a child maintenance order in relation to a child that extends beyond the day on which the child will turn 18 unless the court is satisfied that the provision of the maintenance beyond that day is necessary:
(a) to enable the child to complete his or her education; or
(b) because of a disability of the child.
(3) A child maintenance order in relation to a child stops being in force when the child turns 18 unless the order is expressed to continue in force after then.