Colbeck and Carder (Child support)

This matter concerned an appeal by the applicant, Colbeck, against a decision of the Child Support Registrar concerning the child support assessment for their child. The dispute centred on the adjustment of the liable parent's adjusted taxable income for the purposes of calculating child support. The appeal was heard by Moreland M in the Administrative Appeals Tribunal.

The primary legal issue before the Tribunal was whether the administrative assessment of child support should be amended to reflect a subsequent amended adjusted taxable income of the liable parent, which arose from an amended tax assessment issued by the Australian Taxation Office. The Tribunal was required to determine the correct application of the Child Support (Registration and Collection) Act 1988 in circumstances where a parent's taxable income is retrospectively altered.

Moreland M affirmed the decision under review, reasoning that the Child Support (Registration and Collection) Act 1988 mandates that administrative assessments are to be amended to take into account amended tax assessments. The Tribunal applied the principle that the child support assessment must reflect the most accurate and up-to-date financial information available, including any revisions to a parent's taxable income. Therefore, the amended adjusted taxable income was correctly substituted into the child support calculation.