a parent, guardian or special guardian of any child of the family;

any person F1who is named in a child arrangements order as a person with whom a child of the family is to live, and any applicant for such an order;

any other person who is entitled to apply for F2a child arrangements order which names that person as a person with whom a child is to live;

a local authority, where an order has been made under section 31(1)(a) of the 1989 Act placing a child in its care;

the Official Solicitor, if appointed the children's guardian of a child of the family under rule 16.24; and

F3subject to paragraph (1A), a child of the family who has been given permission to apply for a financial remedy.

for the variation of an order under section 2(1)(c), 6 or 7 of the 1978 Act or paragraph 2(1)(c) of, or Part 2 or 3 of, Schedule 6 to the 2004 Act for periodical payments in respect of a child;

the application is made by the child in question; and

the child in question is aged 16 or over,