Zavala and Child Support Registrar (Child support)

This matter concerned an application for an extension of time made by Mr Zavala to the Administrative Appeals Tribunal (AAT). Mr Zavala sought to have the AAT consider his application for a first review of a decision made by the Child Support Registrar on 19 December 2017, despite the statutory period for lodging such an application having expired. The Child Support Registrar was the other party to the proceedings.

The primary legal issue before the AAT was whether to grant Mr Zavala an extension of time to seek a review of the Registrar's decision. This required the Tribunal to consider the established legal principles governing such applications, including the need for a satisfactory explanation for the delay, the merits of the substantive application, potential prejudice to the other party, and relevant public interest considerations. The Tribunal was guided by case law, including *Lucic v Nolan*, *Martinsen v Secretary, Department of Family & Community Services*, and *Gallo v Dawson*, which emphasise the importance of doing justice between the parties while also respecting statutory time limits.

The Tribunal reasoned that Mr Zavala had not provided a satisfactory explanation for the extensive delay in lodging his application. While acknowledging some mitigating factors, it found that he appeared to have "rested on his rights" and made incorrect assumptions about the process. Furthermore, the Tribunal found no apparent merit in the substantive grounds of Mr Zavala's original objection, noting that the Registrar's decision to refuse an extension appeared reasonable on its face. The Tribunal also expressed significant concern about potential prejudice to the other parent, Ms A, who was entitled to rely on the decision in the absence of a timely objection. Finally, the Tribunal considered the public interest in timely reviews and certainty in administrative processes.

Ultimately, the AAT refused Mr Zavala's application for an extension of time. The Tribunal concluded that the interests of justice were best served by refusing the extension, given the lack of a reasonable explanation for the delay, the apparent lack of merit in the substantive application, and the potential prejudice to Ms A.