Where—
any sum required under the order to be paid to the child may be paid to the person with whom the child has his home, and that person—
Where a child has a right under any enactment to apply for the revival of an order made by a magistrates' court which provided for the making of periodical payments to or for the benefit of the child, the person with whom the child has his home may proceed in his own name for the revival of that order.
Where any person by whom periodical payments are required to be paid to a child under an order made by ... a magistrates' court makes a complaint for the variation or revocation of that order, the person with whom the child has his home may answer the complaint in his own name.
Nothing in subsections (1) and (2) above shall affect any right of a child to proceed in his own name for the variation, revival or revocation of an order or for the recovery of any sum payable thereunder.
In this section references to the person with whom a child has his home—
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In this section "child" means a person who has not attained the age of 18.