An administrative review is a free service managed by Child Support which looks at a child support formula assessment to see if it can be altered to fit a particular situation.
Both paying parents and custodians can apply to Child Support for an administrative review.
Child Support organises the review process, but the actual review is done by an independent person contracted to Inland Revenue. This person is called the review officer. Review officers are experienced in law and follow precedents set by past court cases.